Suggestions for my first longboard

I've been interested in building a board and somehow I've gotten my girlfriend excited for one as well. She wants a pre-built so any suggestions for a complete board that won't break the bank would be appreciated. I however want to build my own, I want to use a skateboard deck instead of a typical longboard deck. I had this supreme deck in mind.
if you guys could tell me parts are really good in the comment section that would be really nice. I don't mind paying extra for my board.