if your blind it don't matter, personally IF I had to choose I would rather have the stock MATCHING wheels then a goofy looking MISMATCHED set..YES YOU CAN SEE THE BACK WHEEL UNLESS YOUR BLIND!!!
IMO, solid wheel on the back, like buckinfitch's, look good with a spoke type wheel on front. I haven't seen very many scoots with mismatched wheels, but the ones I have seen don't seem to work. Continuity is part of any good design.
Depends on the bike i think, a nice 21" front on a stock street glide, with a chromed stock rear looks ok.
Several places have exchanges for chromed stock wheels for $300 or so.
Or do like i'm planning & upgrade the front & put back some money till it's time to change the rear tire any way.