I use the top-of-the-line bibs from Performance ("Elite") and find them superior to a couple of brand-name shorts I've tried in the past. I just wait for them to go on sale; the bibs are currently $50, for example, which isn't bad. They also come in a size that's big enough for me, and that's often a challenge with a lot of cycling clothes.
RichC
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Training: 2002 Fuji Roubaix Pro (105 triple)
Commuting/Daytripping: 2001 Airborne Carpe Diem (Ultegra/XTR, touring wheels)
Commuting/Touring: 2000 Novara Randonee (Sora/Tiagra/LX, fenders, lights)