I'll agree completely with the LSD...I'm just trying to justify it to myself to spend the $2600 for it. (Damn welded ring gear)
As for the rear swaybar...I wouldn't recommend it without an LSD...I"m somewhat regretting it as it spins the inside tire just about every turn.
Again, the very small increase of ride stiffness is well worth it in my opinion. It's not that it's jarring and bumpy...you just notice the roads imperfections more.
I went on a rally session today and said WOW all over again. When accelerating in 1st gear and shifting to second, it feels SOOO much better! Almost like a more rigid feeling, but not jerky.