Those are not too bad as damage go, any decent wheel refinishing shop will take care of that for you cheaper than replacing the wheels - I have the M-sport rims and they are more expensive to refinish as they are that hyper silver instead of just standard silver.
Expect to pay $150 - $200 for refinishing (and I think at the place I use, hypersilver is a $25 add on charge).
These guys look handy to you also http://rimandwheelrepair.com/texas/a...rcos/index.htm
2008 E93 335i, MHD, HPF IC, Injen Intake, AR DPs, Alpina TCU Flash
2016 X5 M-sport 35i JB Stage 1
2013 Mercedes C63 AMG, ROW airboxes, power pipe, Eurocharged V6 Flame tune 540 HP