I vote for the gottrikes.com bender. I purchased the plans and have been very happy with them. I like the idea of a bender that works on a vertical plane. It takes up less garage space when the tube swings upward instead of across the shop, also you do not need a degree wheel to measure your angles a simple magnetic angle meter will work.
I have found some neat DIY tools on the pirate4x4.com site. If you need a tube roll bender for more radiused bends look there at the Harbor Freight roll bender threads. Troy at Swag Offroad makes a set of dies that improves the tool and fills in all the missing dies that HF leaves out. I give the HF bender and the Swag pieces a 10 out of 10 for the money. Plus, most magazines have 20% off coupon these days.
Just my .02cents. Good Luck,
Eric