Weight is not an issue for me, car will be heavy anyway since its not a gutted bracket car. Not really interested in the Lithium deal. I have had good luck in the past with Optima red tops so may just stick with what I know works. I am intrigued with the yellow top and its better warrantee and the dual top & side post. Holley insists on direct connection to the battery for the EFI main power harness and this way I can dedicate the side terminals for that and run the top posts to standard ground and main push/off disconnect to power rest of the car.