I'm putting a subwoofer in my 2004 Rav4 and I'm not sure what size to go. Tweeter guy told me a single 12'' JL Audio W3, Best Buy told me a 10'' or 2 10''s. I'm not looking to go nuts with my sub, I listen to mostly rock and metal. Just wondering what your opinions were on the size I should get. Keep in mind, I don't have a big budget.