I was looking at the Sony SA-WM40 subwoofer and a DIY model. I can buy the unpowered version of a 10 inch sub woofer at Sound Clearing House for $50(plus $20 shipping to Nova Scotia) american dollars. The Sony goes for $300 Canadian with free shipping. Could anyone tell me which would be better? If I went with the DIY I was considering buying two kits. Also, is MDF expensive or hard to find?