The answer is really subjective - have you had a look at the various Beograms listed on the products pages, and if so, do you have a preference looks-wise?
The Beogram 4000 is easily the best built of the lot, and the 4002/4004/6000 derivatives are not far behind in terms of build quality. A 6000 would be a good find as it has a built in RIAA pre-amplifier that you would need (I think) if you want to connect to your system,
The more modern decks such as the 5005/9000/4500 might be a better cosmetic match, and some of these (look in the products section for the answer) have built in RIAAs too. The 5005 doesn't, but some of the others do.
My personal favourite is the Beogram 8002. I got one recently and can't stop listening to it - this is a seriously good deck!
President, Beomaster 8000 Appreciation Society