i agree with Stacie, the plastic flying saucers are basically crud. for what you'll pay in replacement wheels over time due to breakage, it makes more sense to pay that bit more for a good wheel right off the hop. metal flying saucer, silver surfer, or chin spin would be the best wheels to choose from.
your chin will be fine without a wheel until you can get one of the ones mentioned. my Rhino has no wheel and he's perfectly content. i'm saving up for a good wheel for him (the shipping to me is crazy!!!!).