Yeah. Most of the time, your device purchase will be dictated by the number of concurrent connections you need (either due to available channels or number of available wired ports), and even that limitation can be overcome with the addition of a good switch.
The WRT series is probably the
de facto standard router, so much so that there are even 3rd party firmware packages available (DD-wrt, HyperWRT, Tomato, etc). I have not used any of these, but the feature list looks enticing.
If you're looking for performance data, Tom's Hardware has
a router chart similar to that GPU one that keeps popping up.
SIDE NOTE: See what you can do to get rid of/replace your WEP devices. That's a
serious flaw in your network security. If you
must use WEP, make sure those devices are on their own, isolated subnet.
--Patrick