hey there, i bought the rel quake 2 years ago for 350 and am very happy with it, was looking to upgrade to the b+w PV1 but couldnt justify the extra! although i havent heard the sw1500. dont think u would be disappointed with it.
thanx for your reply i was looking for the rel on line when i came across the yamaha £699 down to £199 but i have never seen a yamaha sub reviwed it looks like a monster .but i find myself leaning towards the rel.