I'm with Wally, most guys aren't looking for bang for the buck. You can easily afford weight wise a heavier engine that makes more HP and handle the tradeoff that 15hp is needed for every extra 100lbs.
One of Jake's 2270's is the perfect balance of performance and longevity. Anything more and you need to start shelling out big bucks for longevity and reliability (i.e. Nickies).
Charles Navarro
LN Engineering
http://www.LNengineering.com
Aircooled Precision Performance