I guess I just don't believe in skimping when it comes to car audio. The rest you may be stuck with but I would definitely DITCH THE SONY, Sony has terrible car audio products (ie fall apart shortly after the warranty expires). If you are on that kind of a budget I would look into a JVC. As far as the amp and subs go, it really depends. If you just want blaring bass that only lasts a year or two, then you will be fine. If you actually prefer quality and accuracy or want something that will last for 4-5 years or more, then don't even think about it. The infinity speakers aren't a bad choice though.