The stock 250X has good power, but you have to ride the wheels off it to reach its full potential. The 280 would give a faster rider that extra power, but I think it makes it a little easier for a less advanced rider to ride it also. From what I've read it gives it a little more meat all over. The 280 would be sweet, but if I were you I'd focus on trying to get the most out of the stock motor before you mess with it. We can work on that this year!