Hi all I've had a Boston Acoustics XS system for 2.5 years, it's been great, but I'm no audiophile. Recently I noticed that my sub wasn't working, and appears to have blown as it has no power to it at all. I have two immediate choices:- 1. I can try and get the sub fixed for £30-£50, failing that I could buy a new sub, but it won't match, I'm guessing £120ish 2. Or I could upgrade the whole system to a Kef1505, but will I notice a real difference? Prior to the sub blowing I was toying with the idea of upgrading to a Kef T series package, mainly for the aesthetic appearance (they look so cool) but £1500 is a lot of money for me to spend on speakers, should I just keep saving and go the whole hog?