My 5.5 inch navy is probably as heavy as your CZ75, but with my lined belt it is hardly noticeable, and stay tight to my side in a Threepersons holster. Actually I got complimented by the staff at Guns Plus yesterday at my rig, many people think I have hundreds of dollars into it, and the whole thing with two holsters, bowie knife sheath, razor knife sheath, snake skin flashlight holder, cap pouch with two speed loaders was under 100 bucks.
Don't leave out surplus, right now you can get two used German 1.75 leather belts for about 15 bucks, cut one to use to half line the other. You can go to upholster shops and by 2 inch heavy canvas straps and double them to make a mills belt(Indian Wars). Use 1 inch strap for cartridge holders. Or just buy a extra heavy riggers belt, and have a dry cleaner line half the belt for you.