I actually just bought new tires about 2 weeks ago, I have a 04 Sportivo 2.4, it had 195 supercat tires on it when i bought it and they were terrible, I then bought a set of 235 XR6 wheels which had the Michelin Pilot Sport 3s on it and the difference was incredible, but they can be quite costly and they're a softer compound so they wear fairly fast, I went to Jax and ended up getting a set of Hankook Ventus V2 Concepts with the buy four get get $100 off, cost me $380 + $66 for a balance. Now I'm not saying they're as grippy as the PS3s, but if the supercats were a 1 and the PS3s were a 10, I'd say the Ventus V2s would be a 7, definitely good value, plus they're a lot quieter than the PS3s.
tl;dr Can recommend the Hankook Ventus V2 Concepts from Jax Tires, $120ea + $100 off a set of 4, pretty grippy, won't wear as fast as softer performance tires and will be quieter.
Plus Hankook will replace a tire for free if gets damaged from a road hazard.