I agree with kpr10is. Your DIY fit and finish is nice and deserving of props. However, being a previous dealer of Quantum products, I have to tell you that they are on the lower end of the product lines out there. I have had my above-average share of returns on their amps and subs alike. Never problems with their mids/highs except that the quality of sound just was not there.
With all the effort you are putting into a quality looking setup, it is worthy of better equipment. At the very least, maybe some JBL GTO series or JL Audio TMA line. Just my 2 cents...