BT Jazz I guess... Otherwise the Japanese release of HA has the better detailing (imho).

Favorite BT would be Laserwave due to RX-8 and its articulation and coloring, favorite Alternator would be Silver Streak (the BT version is too heavy causing the joints to lose friction) due to its articulation and you see 2004 WRXs every day, also one of the few Alts that are painted. Overall favorite is possibly Hot Rodimus from Kiss Players tho, great mold with good articulation, and he comes with Syao Syao... and a fishing rod!!! (Also stupidly expensive now).