I'll throw in my 2 cents here... I've used both the Linksys and the SMC routers. I like them both. I personally own the SMC because of the built-in print server. It is an all-in-one shot with the SMC. That being said, my first SMC was one of the first production models. I bought it right after it became available. Unfortunately, this one went on the fritz, and SMC had to replace it. I haven't had any problems with the replacement, and the firmware upgrades keep improving the router's overall peformance.
On the other hand, I will recommend the Linksys whole-heartedly. The Linksys is in many ways easier to use, and is friendlier. The only thing missing is the print server and an on-off switch.
Ryan