I think the main concern with wheels that wide is if they would clear the strut assembly up front, especially if you're going to dial in some negative camber or add camber plates, there might be some scrub within the wheel well at full lock. Ideally, you'd probably want to get a 10.5 wide wheel to test fit and see if anything hits just putting it on, or when the wheel is fully turned left and right.
Yea, that was one of my main concerns. Only reason I'd add camber is if it would be needed. Although, I was looking at some posts the other day about 20x10s, maybe 20x10.5s (I believe), that were talking about the fitments. Honestly, I can't remember but I believe JITB said that 10.5s wouldn't affect the struts, just would need some rolling done to the fenders. There's a couple people on here running 20x10s and 10.5s and they don't seem to have any problems.