288's are fine for stopping, but the feel and progressiveness is much better on 312's. I've treated 288's really badly and they won't fade if you've got good quality pads and discs. 

45 minutes ago, StevesTruck said:

288's are fine for stopping, but the feel and progressiveness is much better on 312's. I've treated 288's really badly and they won't fade if you've got good quality pads and discs. 

 

I agree that bigger is always better for front brakes but as you say it's perfectly possible to make the stock 288's work well.