i would rather have the ws6 because it is american made and actually has some balls common, american made cars are not as poorly made as you think. i believe buick is one of the most reliable cars in the country ahead of honda. according to jd power and assc. buick had way less problems mechanically per 100 cars. than honda. im sorry if i am being an ass. i am just sick and tired of everybody thinking "oh, its an american car" "it will fall apart" thats b.s think what you want, but you are ignorant. i myself like all kinda off cars american or import. i especially like the s2000, but lets not kid outselvs here the ws6 stock would absolutly destroy the s2000 even with bolt ons. ls1's are are very underrated from the factory. most ls1's dyno with over 300 rwhp. and with a rating of 310 for lets say a z28, i would say they put out anyware near 340-350 stock. thats why many ls1's 'properly driven, even auto's can be high 12's stock or at least lid and cutout. thats my .02
Nick