I have aluminum grips on only one of my handguns and it is one that has a lot of recoil. I like the look, I love the feel and as it isn't a carry gun, the weight isn't something I notice and if anything, it makes the experience better.
One thing that has NOT yet been mentioned with aluminum grips is that unlike wood, plastic or rubber, there is zero "give" whatsoever and this means that you can attempt to snug down the grip screws but they will loosen themselves regularly and without help, you can't stop 'em and it's royally annoying.
A drip of thread lock works, but that's also annoying, in my opinion, so a better solution are rubber o-rings between the grip and the grip screws. This allows you a slight cushion to tighten down the grips screws where they (hopefully!) stay put.
If I were outfitting a CZ-75 with new grips, I would head to Lok Grips and shop for hours and second and triple-guess my choices, as they have a mind boggling array and most are incredibly gorgeous. Very happy with the Lok Grips I bought for my CZ-75 TS.