Just put the front and rear braces on and it is a world of difference. No more wiggle from the rear and the front feels more planted. Only a slight increase in NVH noticed over sharp expansion bumps. Still very comfortable and now much more predictable when driving vigorously. Worth every penny to me.

Just picked up an 04 for the wife for $7,300. Absolutely love the seats and ride. Getting 23 mpg in town with it so far. Starting our mods with suspension braces and sway bars to tighten it up a bit.

Thanks for the recommendations guys. Sway bars are on the list as well.

Just picked up an 04 S60 AWD and I love the ride but... it wallows a bit with the minor "spirited" driving I do. Has anyone used the suspension braces that Viva Performance offers and what did you think? Are there any other brands of braces out there you have tried with good results? I'm l...

Sounds like you have access to some form of OBD device. See if it goes to open loop when it is misbehaving. That was one of the additional indicators to an O2 sensor issue on my friends 70 with very similar issues. Replacing the sensors helped his, couldn't hurt yours (except for the wallet anyway).