I think we can definitely help you out, best to ask before buying as we like to say around here. There are some excellent choices out there without getting sucked into silly wire and electrical boxes like the seller you have apparently has. Lots of choices and tech to consider indeed. Start with just how would you like to source/stream your digital files (definitely would not recommend going back to vinyl, altho I still buy and rip cds...and play them not on optical disc players generally).
Where does the $750 fit in budget-wise?