I was in the same situation as you a couple of years ago. The big thing I learned is that if you want to play the upright, buy an upright. EUBs just aren't the same. The tone isn't quite the same and the ergonomics are significantly different. If you get the EUB you'll probably be jonesing for a double bass none too long, then you'll be back where you started. Also the Dean is garbage.
The most DB-like EUB I've come across is the Eminence, but the price is in a different ballpark. But if you really want it to play like a DB and somewhat sound like a DB, that is the one IMHO.