aaaaaargh .....colour me green every time I look at your US HK prices.
I don't think the power levels will make any real difference so you might as well base it on other features or cosmetics. The 7200 is VERY large, a little over 20" deep. That unit was almost $2k when it first came out and now it's around $800 makes a lot of sense to buy it now while it is still available. If I had to chose I'd go with the 7200.
Just a thought, if you want a SVS then get a SVS. Two years from now you'll probably still have the same subwoofer and by then the money difference will be meaningless.