Well, you know I wear the lighter hair.. and I have to say, after recently trying AGAIN to purchase colored hair, IMHO ALL colored hair from the vendors sux. Anything lighter than a 4, you HAVE to do it yourself to still have decent hair at the end. I just hate all the work involved of coloring every single wig I own, but I think I am sticking with it! I've tried virgin Chinese and Malay from a few vendors, colored in a 6 or a 30, and .. no WAY was the hair as nice as the result I get coloring from virgin myself. I don't have a split end problem, so I have to wonder if you are using harsher coloring than me or something in your technique is contributing to that problem.
Sorry that doesn't help.. as for vendors, I would definitely go with Holly over Roman Any. Day. I have used both. Holly's standard stock density is quite thin in front, though, so you know. But crown density tends to be good!
Roman's hair ain't nuthin to write home about and neither is his customer service, IMHO.