My advice is to go to thezeb.com and look around. I know you can get a Planet Audio 4-channel for $190, I just bought that it will be installed next week, that would be good for your speakers. I'd get a mono amp and use it for your sub. My suggestion is to email them and tell them that you need a sub and a mono amp to push it and tell them what your budget is. They will probably help you out. thenewwoofersetc.com is another place you can email and tell them what you are needing and Andrew will help you. I emailed woofers and told him what subs I had and he sent me some choices of amps that would work well. Good luck I am a car audio novice, and that's how I got a good system.
