Sentinel wrote:I can't say about the front sway bar, but I think the RSB improved the handling more than the lowering and "too stiff" shocks. 
(I did the RSB first) 
They come with bushings & lube goo, and that's all you need to install one besides hand tools, some jackstands, and a bit of patience. 
(I swore at mine for about a half hour longer than I thought I should have had to to install it: make sure you take at least one tire off) 
It even comes with instructions and a WARNING: "track use blah blah"
I got mine from a Toyota dealer that sold off the web, 'bout $150.
2000 SLEv6: TRD RSB, Eibach, Tokico. 
Dealer swore they didn't make the V6 with a Manual. 
(Translation: They didn't have a manual to sell me)
P.S. Cuz' we talkin sway bars: has anyone seen a skid pad test with the RSB on street as opposed to track , and has anyone put theirs on "Street" or have we all put 'em on "Track" ??
Sentinel is completely right.  The RSB comes with everything you need, about $150 sounds right.  I put the RSB on after shocks and struts and there was still a major difference.  As for the FSB, I don't want to get into different opinions, but the only reason why I got one was for looks...personally, I didn't notice a difference in handling with the stock one versus the TRD one.  
As for the difference on Street v. Track settings.  When I first put the RSB on I could've sworn it was on track, but someone actually posted a picture later on of the actual hole it needs to go into, so I switched it.  Difference wise, I noticed a little bit of change but I'm sure you would definitely feel it if you were going a lot faster.  Oh yeah, and if you do decide to put it on track setting, that WARNING they tell you in the instructions, forget about it........