Personally i would stay with a staggered wheel set-up, it's what the car was designed around. ASA is carried by Tirerack and others, but is not made by BBS. Find out what offset these wheels are before getting too excited, and maybe consider selling one pair and getting some wider wheels for the rear. If you were to go a square set-up (all four wheels one size) you could probably go with a 245 series tire. Depending on offset, ride height, etc.
named: Tachi, Katana, Wakizashi and Nodachi
“Please take good care of your S2000, keep it by your side for long and enjoy it from the bottom of your heart. And share the quality and legacy of the S2000 with many friends so that the legend of the S2000 will continue for long” – Shigeru Uehara.