I have 24's and they ride nice. and I think the amount money youll be spending on 26's is too much especially to take the risk of havin such a low profile tire cuz then you gotta drop some more money on some kind of brake upgrade, another wheel if you bend it, and tires will be more expensive. plus I think youll be satisfied with the 4's.
I was asking myself all the same questions when I was gettin my wheels and I went the 4's and I still love them. every now and then I see this one black hoe on 6's and I couldnt really tell if they were 6's or 4's I had to ask somebody who knew the guy if that tells you anything.
24"s FTW