The IPS sport front UCA's are a fair price at $600 + shocks.
These will give you some camber while turning (instead of taking it away), and GREATLY reduce understeer. The sport package uses the stock lowers control arms, springs, spindles etc...
I'm thinking about it myself. When you consider $200 for CC plates, and $100 for a strut tower brace (both of which you won't need), you're already half way to the price of something A LOT better.
The next step up is $2000, and you get the coil overs, K-member, lower control arms, etc... but ya, I think that price is a little steep.
I'd really like to get rid of the stock UCA's in the back, but there really isn't a cheap alternative. I'm thinking about making up some parallel uppers myself, and then using a panhard for lateral location.
For the rear LCA's, I think the
www.wmsracing.com or granatelli/ground pounder arms are the best. Both have weight jackers, spherical bearings on the chassis end, and urethane on the axle end. The GP's are $285, and the WMS's are $335 (but you get anti-squat brackets).