stabilizer bar upgrades?

Greets, I recently bought an 03 4x4 Yukon SLT. My old 4x4 toyota handled like it was on rails, this thing is a tuna boat with the stock 16" tyres..

Almost immediately I installed 20" EPIC forged rims and goodyear tyres which was a HUGE improvement in many ways. However, when I push it around corners the back end seems to want to come around pretty quickly. Especially going down hills. My lifted 4x4 Toyota would go significantly faster around the corners without any problems etc.

:lol2: Yes I KNOW my YUKON is not a race car...... I am not talking about really driving hard, just going at a quick pace through twisties.

I also notice that the thing has alot of body roll. I am thinking that those sway bars on each end could be seriously upgraded if possible to get less body roll but not make a stiff ride... Ideas? Kits? Where to buy? Cost? Evaluations?

Thanks! Otherwise I love my Yukon, so does my wife and friends. I put 270,000 miles on the 84 toyota, time will tell how the Yukon holds out.....

I'd be interested in some stabilizer bars as well. My other car does handle like it's on rails so getting in the Yukon after than can be a bit scary for the first few turns.