i went to the BA web site and looked at the 7120. looks classy and weighs a lot. rated at 120 wpc. no HDMi, as far as i can tell. i didn't look very long, though. it may have some unique features, but i would seriously look at my aforementioned suggestions ahead of the BA, unless the 7210 has some unusual feature you absolutely need that nobody else offers.
i am a yamaha believer. the next person who replies may be a denon believer. decide what features are important to you (example, HDMI or not), decide how much you want to spend, compare a few products, both on paper and in person, listen to them, buy from a reputable dealer (and an authorized dealer if the manufacturer of the product you choose requires that for warranty purposes), buy it and then be happy. however, unless you take your speakers and your room to the store, what you hear in the store will likely not be what you hear at home. i always make sure there is a 30 day or more full money back return policy when i buy expensive items like electronics. and, finally, never ever buy an extended warranty on consumer electronics.