I got my kit from RE and they sent me the Bilsteins, maybe they were out of theirs... I did NOT complain. I haven't heard anything bad about the RE shocks, but I am loving the set up I have right now.
I have not re-geared or used any flashpaq type device yet. I plan to get a flashpaq to recalibrate the speedo for the bigger tires and hopefully get some power back as well. I don't plan on re-gearing. I have the manual 6 speed, and although its more sluggish than it was before the bigger tires, I can still use 6th gear on the highways. Some people will tell you without re-gearing or a computer update (flashpaq or AEV) that you can forget about using 6th gear. Not true. Gas mileage definitely suffers, but its not unbearable to drive by any means.
I haven't added any spring spacers to the front to level it off...YET, but I have them, and when I get a spare few hours, I'll be adding 3/4 of an inch to the front.
The Green Monster
2007 JK Rubicon Unlimited
3.5in RE lift (+ 3/4" spacers in front), Bilstein 5100's, 35in Wrangler Duratracs on TIS 535 Wheels, 5.13 Yukon gears with Solid diff Covers, Warn Front Bumper with 7" Warn HID's and a 8500lb winch, OF Fab Swing Away Tire/Gerry Can Carrier, Line-X'd tub