The claim of 100 extra HP is way off base but the 165 heads are an excellent choice anyway. Do NOT waste your time with 1.7:1 rockers. your cam will be fine using the stock ratio of 1.6:1.
If you go with them...I'd order them from here http://www.jdsperformance.com/index.asp?initemuid=330&fcmd=item&inmake=0 it's where I got mine from. Don't order them from the site...CALL them and place the order. They will beat the advertised price...they can only post a certain advertised price, but if you call them, they will beat it. I couldn't find a better price...