Kelty has been around forever in the backpacking gear world. I currently own four Kelty tents. As long as you avoid the cheaper models with fiberglass poles and skimpy rain flies, you will get a great product. The true backpacking tents I have from Kelty are every bit as good as my very spendy MSR backpacking tent, in design, materials, and workmanship.
If money isn't an issue, my favorite one man tent, because of the pole configuration and available "living" space, is the MSR Hubba. I have the 3 man version of this one and love it.
I often find the best prices online at campmor.com and sunnysports.com