Ok here it is, I would very much like this to be a be all end all to the 3" or so lifts.
From trolling around over here these are my impressions of these lifts/coils
Jeep TJ Suspension Lift
Front and rear progressive coil springs, transfer case spacers to maintain factory driveshaft angles, and front and rear Performance 2.2 shocks - setting a new standard in shock design.
Kit or Coils only
2.2 shocks leak
(I assume this isn't Black Diamond)
BDS Suspension Kit Details
This kit comes with four new Pro-Ride coil springs capable of full coil bind. The box kit includes bump stop extensions, rear track bar relocation, rear sway bar links, front alignment cam bolts, and the ultimate front sway bar disconnects.
More complete than RC 2.5
Better Ride than 2.5 supposedly
Old Man Emu for Jeeps Wrangler, Rubicon, Unlimited
Lots and lots, click the link above.
The gold standard in OEM or better ride.
Fairly complete kit.
Offered the option of the Budget Kit.
AEV 3" Coils
Nth Degree springs are designed the same way, even including the special benefit of a progressive-rate design: the more you load it, the stiffer it gets – keeping the frequency nearly constant. Because the relationship of the front springs to the rear is also critical to great ride and safe handling, Nth Degree springs are tuned and intended to be used together as matched F/R sets - we do not recommend they be combined with other makers' springs. As part of an Nth Degree suspension system or to replace your existing 'lift' springs, these will perform beautifully whether loaded or empty, both on-road and off.
Supposedly very high quality
Zone Off-Road 3"
(thanks to Wheelin98TJ)
Available in a combo kit with a 1.25" body lift and a 1" MML
Nice riding shocks and coils (I am 99% certain they are the exact same as BDS)
Fixed front sway bar links rather than disconnects
3" kit comes with: Coils, shocks, sway bar links front and rear, rear track bar bracket, t-case drop, bumpstop extensions
Zone Off-road has common owners with BDS and they share many parts suppliers.