Mecoa also sells the HP Gold Cup which is more powerfull than the Kraft. There is also the Webra from Horizon which may be cheaper than the Gold Cup. Also look at the K&B twist head for about a $100, also from Mecoa. http://www.mecoa.com The Fox .61 would also be a good choice.

If money is no object then check out Jett.

If you are not intrested in SPA competition or just starting thus in Novice, then a good .75 sized engine might be better.