As part of my on going speaker upgrade I was looking to buy a new subwoofer. Given that the Mission M73 speakers I have go down to about 48hz I need a suitable sub that carries on down from there,it also cannot cost a great deal (£300ish) so the likes of some REL's might be out. Most of the cheaper ones I have looked at only go down to about 44Hz which hardly seems worth the extra 4Hz for the cost! Any suggestions anyone??