Another thing I didn't see mentioned was if you're going to hunt with this bow. If you are, the BK II and the mathews you mentioned have very short brace heights, whichi n turn most likely will translate into arm slap if you have your bulky hunting clothes on. This will effect accuracy as well.
Everyone is giving sound advice. Look for a milder shooting bow that has medium ATA and a generous Brace. You'll be a lot happier in the long run and will shoot it extremely accurate in just about any environment.
Also, I'd just like to point out that you definitely seem to be open minded and willing to learn. Not taking offense to what is being suggested to you. I commend you on that. Seems lately there are a lot of people on this board, and others who ask a question, then flame everyones response. Go figure