Hello, I'm looking for my first subwoofer budget from £300-700 depending on whether there is a big difference. My room is 5X4 Meters so not that big I have heard the REL Quake yesterday, I was impressed but I want something Faster & Tighter, I want bass not BOOM!!! will the M&K K10 be any good though its quite expensive compared to the the competition. If anyone has any suggestions pls let me know. System: Onkyo 898 THX Reciever Onkyo 989 THX DVD Player M&K K4 Tripoles (excellent) M&K K7 LCR (also excellent) SUB = ??