Hi,
A lot depends on what you want to do with a router. If you want to spin big 3-1/2" bits you need a hefty router with lots of power and variable speed. If you want to make signs you want something small and light, and with a plunge base most likely. If you think you are going to want to put it in a OPR then think of something with a round body that will fit it.
To be honest I've lost count now, but, I think I have at least a dozen routers. I still have the original 1/4" single speed Craftsman I got in 1976 all the way up to the Trend T4 I got this spring.
Router are really something that is person tool and needs to fell good in your hands and operate with you. It also helps once you pick a brand that you try to make use of exchanging accessories within the brand or with a brand that matches. As an example when I got my first Porter Cable 690 the guide bushing were a very different style then the Craftsman so I had to buy a set to fit the new router, same with the edge guide and other parts. Once I had the first 690 I picked up a second because it fit the same base, and the additional based (plunge and D-handle), guide bushing, edge guides as the first one. I also picked up a trim router from them for the same basic reason. Jumping ahead a ways when I started with Hitachi was because I was looking for something different and in fact when thinking I was going to buy a Bosch... that didn't happen but I loved the feel of the Hitachi in the store and I now own 4 of them. A lot of the accessories happen to be interchangeable with the Porter Cable router I have which was a plus.
I have a couple of special purpose routers that I got because of certain features they had that were not common with other routers. So sometimes that out ways other considerations. This starts to happen after you gain more expedience with what you find you want to do with your router and how you want to be able to do it.
I have the old opr set up with a Hitachi KM12V in the arm and a second in the table. I have one in a case which is the kit version (KM12VC) that I use in the shop or take with me as needed. I have a fixed base mounted on one of my Oak- Park (Router workshop tables). I have a spare fix base mount on a router plate that goes to the Jointech table on the shopsmith as needed. Bingo 4 router just like that. I have a fix base mount on my Joint-Matic that excepts a 690. I have another router plate set up with another fixed base mount that takes a 690. One of my 690's gets used for these while the other one is either in a D-handle or a plunge base for hand work. That gets us to 6 routers. I have a 3-1/2 HP router that is permanently table mounted (at 12.8 pounds + router lift this is where it fits in best). That's 7. I have 2 trim routers, one is a Porter Cable with several bases (both homemade and purchased) and is also used as a trim router. The other one is a Hitachi that I got as a special purpose router with some interesting attachments... So that gets us to 9. I still have the original craftsman which is used with some old attachments that are special to craftsman hardware. That is 10. I have an old wards router that must have been made by a tank manufacture that has a long cord and internal light and just will not die. This one I lone out. That is 11... and so with my purchase this spring of the Trend T4, (mainly for the fact it is a plunge based router and small thus great for things like making signs or other work where a heavy router is just to heavy to make it comfortable for me to work anymore) it comes out to an even dozen.
Just remember the cost is not in the routers, they are cheap enough that a well paid engineer can afford at least a dozen of them. The bits how ever can eat you up. I don't have a good count on how many I have but it is over 300. Now some bit are cheap and some are expensive so lets go with an average cost of $15... now do the math $4500.
If you want a general purpose router for mostly hand work do a little hands on at a couple of stores, pick one with at least the following:
10 to 12 amps
1/4" and 1/2" collet
plunge base or a combo kit with both(fixed and plunge)
variable speed
accepts standard Porter Cable template guides
name brand
If you get hooked on using a router you can expect to have several with in short while and those you will get because you know what you want which is the way it should be.
If I had the money I get at least 2 more routers this year but as it is they are not even making next years list....
I did a few write ups at the routerforums, one was a review of the Hitachi router and another was something like new router my way... you should be able to find it my adding reible and site:
http://www.routerforums.com to your google search.
Ed