If you want top shelf stuff, you're going to spend 7-8K plus the converter. Less if you just want something to function and live. Either way, if I didn't know my way around one, I would talk to one of the shops that do them everyday. You can throw some good parts in one, get it put together pretty close and do OK for most applications, but you're in a little bit different situation depending on how up-to-date your combination is.