SO true on the weight savings. I started out going with BBS RS-GT wheels, not cheap but close to 10lb lighter per wheel than stock. Aux radiator delete with all of the lines, Onstar stripped but B.T (OEM) added. Started with an Odyssey 925T battery going from the 50+lb OEM down to 26lbs, now I went to a Antigravity Lithium which takes it down to 5.5lbs (weight out back but still weight). Stripping the DRC and lines and going to KWV3 struts/shocks was at least another 20+lbs. As Muggy said, I think the 6spd conversion saved close to 100lbs. Catless saves some more.
So far I think I'm down over 200+lbs without losing any driveability or comfort....no rice mods.