My new favorite brand of tents is Alps Mountaineering. They've positioned themselves somewhere between the high-end tents and Eureka. Pretty similar to Kelty tents, but I tend to like the Alps Mountaineering features better.
http://www.alpsmountaineering.com So far I have a Meramac 6-person with heavy-duty floors and both fiberglass and aluminum pole sets, and for Christmas my wife just bought me a Taurus Outfitter 5-person. The Meramac makes a great warm-weather tent, and the Taurus is a great cool-weather tent.
If you happen to be involved in Scouting (Boy, Cub, Girl, ...), they'll give you a 45% discount, which is FANTASTIC!!
For a 4-season tent, the best deal I've found is a Eureka Assault Outfitter 4-person tent.
Ken K.