I am on a limited budget and was told DIY was best. I have been reading about it on Brian's website and other websites. I can build a sub now. I need to know what parts would be good to use on my budget, which is 200 max. Cabinet: Home Depot sells MDF for 25. I am going to build a sealed enclosure. That leaves the driver and amp. Amp: Is a plate amp the best/cheapest way to go? Can I get an external amp for cheaper? I do need a amp though. Then the driver. Driver: Im still deciding to go with a 10 or 12, no bigger and no less. So what I need is a amp and driver for around 150. My room is 12 by 10.6 and I listen 80% to music. What are the best parts for the money I can get? Is it safe to buy these used? Anybody selling?