to the OP, you want a nice set of quality wheels, you're obviously going to have to pay more. You want 20's, get 20's, just make sure you do it right so it doesn't cost you in the long run..
To the rest, If you're going to cheap out on a set of wheels, why buy them period. It's not like you drive on them everyday or that they're a safety hazard...when you hit that pot hole, don't cry when your cheap replica wheel cracks sending you into a fire hydrant or tree. Seen both of these happen