...........I would like to upgrade my Jamo 200 watt (part of the A10 style package) sub to work with my MA 5.1 (see sig). The very well touted RSW12 is the obvious choice but I would rather not shell out £650. Are there reasonable alternatives at £200-300? I would go second hand/ex demo no problem. I would like a box that is not overly sized - 40cm x 40cm x40cm max.