Slam it first, run it on whatever wheels you got (will still look good as long as they're tucked) and save for some nice wheels in the summer or next year (depends how much money you have). Its still winter wheel season for another couple o months anyway- jus tidy it up as much as poss like others have said. It took me 2 years to fully decide what rims I wanted, and plenty of shows to see them in the flesh, narrowed it to borbet a/b or ronal ls's. Couldn't find decent b's, a's look a bit too rollerskate like, so went for the ronals as they're v good rims for the £