Kill,
Yes there is such a class. I think what you're essentially saying is you are between Norwood 2 & 3? Glad to hear you are really thinking things through. As Trep said 250 grafts is hardly worth doing considering the implied risks he mentioned.
Trep is also right about Propecia (finasteride), it only buys us some time, never a cure. male pattern baldness is indeed progressive because it is a genetic predisposition we receive at conception, something we cannot change.