[husker boxster]

I'm very early in my research on the topic so I'll be interested to see what others suggest. But one of the vendors you list doesn't use aluminum cylinder liners. The liners they use won't dissipate heat as well as aluminum, making it harder to cool the engine. I'm not going to mention the vendors name, but it won't be hard to figure out who. I was really considering them but now not so much.