I would go with at least a 12" sub, something like a SVS plus series. As far as the surrounds go, I own both, and when I upgraded from the BP1.2x to the BP2x in my main system, I didn't really notice that much of a difference. I bought all my def tech speakers used, so I didn't spend a ton of money on them, but if you can find a good price on some used BP2x go with those, but if you are buying new, save your money and get the 1.2x.