I finally got around to cutting down my stock 08 windshield. The first 2" cut really didn't help, but the 2nd 2" cut, bringing it to 4" total, made the windshield much better. Now, I'm in clean air, and only get buffeting with the shield all the way up. I matched the stock curve of the windshield, rather than going with the rounded/curved style. Pic attached. I'm not planning on tinting the w/s at this time. I may radius the corners a bit more, but may just leave it as is for a while.
I also have an OEM tall w/s for the cooler months.