what kind of improvements do you want to make?
if i could do it all over again i'd do it in this order:
suspension-GC and koni yellows, progress rear sway
Wheels/Tires-lightweight 16x7's with 225/45/16 tires or 15x7 with 225/45/15's
Bolt-ons: Ebay CAI/SMSP header/HF Cat/RSR Exmag
my car is pretty much the same as what you see up there and a couple more things, i just went about it in a round about way.