I would absoluely love some pre-painted durable non-random plastic minis. However, I would certainly suggest focusing on minis that are not common or uncommon in the WotC sets because, quite frankly, these can be found very inexpensively on e-bay or other sellers of individual miniatures. (You can usually get a set of 6 common minis for under $3 on e-bay - sometimes even less.)
As for the price, that's not as much an issue with me for impressive figures. I know I would purchase monster minis (as opposed to PC-type minis), especially in the huge, garganutuan, and colossal sizes in a heartbeat.