Looking to do a budget system in my 88 Cadillac SeVille. I need the best SPL I can get for around $60 shipped, for a single 12" or 15" sub. SVC 4 ohm or DVC 2 or 8 ohm. power around 300w. i am also open to suggestions. I was looking at a Shiva around this price, but was sure i could get something with better SPL. list what u got!