The KEF website has some new subwoofers. The PSW3000 (for their Q range of speaker), PSW4000 & PSW5000 (reference range). Has anyone had a chance to demo any of these yet? I am looking for a sub to go with my KEF Q35.2 but the REL Q150 doesn't seem up to much judging by its reception on this forum. Any suggestions? Budget of 300-500 GBP.