yes original ones are both good
its already has sports looks
rather there are not any sports rims are available in the market(new)
so it wud be better to use new rims rather used sports alloy rims coz that will ruin the pleasure
tyres are also according to the ride in size but u can use different brand if u are not happy by stocks performance, but the size of the tyres are the main concern
but if u are really interested in sports rim then u should buy silver spokes rims from abroad,