OP,
Beware chasing status, there are many on this board who will likely envy you. By not having allegiance to a specific airline you have the freedom to choose the flight schedule, etc. that best suits your needs. Instead of chasing status you might be better served getting a credit card such as the Amex Platinum card which can get you lounge access, etc. And, as someone else mentioned does either WS or AC get you to all of the places you need to go? Even if you could concentrate your flying on a specific airline, you might still have to split your flying to get where you need to.
Don't get me wrong, I really enjoy having my various statuses, but its like an addiction. At year end, I start spending personal money and making trips I likely shouldn't just to renew if I'm short of the required cut-off (which is what the companies want you to do).