Not really sure Patrick. I'm thinking high quality. Looking at some of the prices, it will be something I'll get together slowly- not just buy it all in one go.
With the general shape of the chassis', I reckon a Slabby GSXR replica would be sweet.
Start with the cheap ones, if you ask me. Then if you really like it and want to move to the more expensive ones, do that. I don't think the high end stuff is worth the money necessarily, unless the price is really not a concern.