here is a list of tires in the OEM (215/45/17) sorted by approximate
(current) price:
$??? Bridgestone Potenza RE-040 * %%
$235 Michelin Pilot Sport *
$210 Dunlop SP Sport 2000
$195 Pirelli PZero Asimmetrico
$190 Bridgestone Potenza S-02 Pole Position
$185 Goodyear Eagel GS-D * ##
$180 Michelin MXX3 Pilot SX
$170 Pirelli P6000
$165 Michelin Pilot SX-GT (available in 215/45/17?)
$165 Goodyear Eagle F1 GS-D2 *
$160 Yokohama AVS Sport
$160 Yokohama AVS S1
$160 Firestore Firehawk SZ50
$150 Pirelli P7000
$145 Continental Sport Contact
$135 Micehlin XGT H4 RBL
$125 Pirelli P7000 Supersport
$125 Michelin Pilot Alpin
$125 Bridgestone Potenza RE730
$120 Goodyear Eagle HP Ultra
$120 Dunlop SP Sport 9000 *
$120 Dunlop SP Sport 8000
$120 BFGoodrich Comp T/A ZR
$115 Yokohama A520
$115 Sumitomo HTR Z II
$110 Dunlop SP W10
$110 Dunlop SP Sport W10
$100 Yokohama Avid H4
$100 Yokohama AVS Intermediate
$100 Sumitomo HTR Z
$100 Kumho ECSTA Supra 712
$100 Bridgestone Potenza RE910
$095 Bridgestone Potenza RE71
%%=OEM IS300 tire (33% of production)
##=OEM IS300 tire (66% of production)
*=Lexus recommended tire
Here is a nice review site:
http://carreview.com/reviews/tires/