Don't get a poor quality Chinese engine. If you want good quality at a reasonable price call Fox, don't buy on their website. You can trade in a trash engine and get 50% off. Better quality than OS right now. Yes, I know they have had quality issues before but right now they are very good.
www.foxmanufacturing.com
Their phone number is there somewhere and I know they will give you a good deal.
If price is no issue then get a Jett engine. But don't get a Magnum.