I'm not sure what you mean by cool: Anyway: 4 Cyl. any Toyota or VW. For the V6 or straight 6; Buick Specials had a good V6 and looked good and were fun to drive, Pontiac had the OHV 6. in Tempest and Firebird, Corvair had 4 cyl and and 6 cyl. (boxster engines} some w/turbo, Ford had Mustangs and Falcons with straight 6's, Chevy had Novas with a straight 6, Saab had a V4 in the Sonnet, Datsun 240Z straight 6, First gen. Supra(straight 6). Now that all said the Buick V6 is a good call.