Welcome aboard, good to see you here. Personally, I would select the vendor of the turbo I wanted buy from and get his guidance on which turbo to use and at what compression ratio and to boost numbers etc. etc., We don't mind helping spend your money at all. But if it all goes south, you are left holding the bag!

But maybe there's someone here who can offer some guidance / opinion.. Sounds like an interesting build too. Maybe share some pics when you've a chance!