Removing A/C from 1994 325i, cons, problems, difficulties, whats the best way?

I have a 1994 bmw 325i convertible, that has already been modified by racing dynamics, including adjustable suspension and anti-roll bars, engine bay tower struts, and racing exhaust. As far as i can tell the m50tu engine is completely stock. It handles like a dream, but i've always found it to be a little lacking in the get-up-and-go department (which really didn't bother me much till one day i tried to pass a semi on a slightly hilly road and couldn't get around it before the next hill), so i've been looking into ways to up the horsepower without sacrificing mpgs. Obviously the best way to do this is get rid of weight. Since its a convertible i never use the A/C, so i'm wondering if i can just remove it, or as is often the case with BMWs, is it not that easy? Will i no longer be able to run the defroster if i do? What can i get rid of without compromising other systems? Whats the best way to go about it? What other mods can i make to get my desired result? I should mention that the car is an auto (woe is me) and i only want as much power as the tranny can handle without shortening its life or serious modifications.|||make sure the serpentine belt will not be to long if you remove the AC