All this talk of stomach-turning rumbles has finally persuaded me to complete my setup with a suitable sub. Amp - Sony 930 (to be replaced with a Denon something or other next year) DVD - Pioneer 530 Speakers - Missions 78 series. (782s, 78C, 78DSs) Is important to match a SUB to what I have?.. or should I just pick a budget, and buy whatever gets a good review? Demo'ing will be difficult, cos there's no sub retailer within a 100 miles of me!