That can be a little difficult with little to no credit history. Not sure on your credit history, but one or two secured major bank credit cards is a good start. Once you have some history, you can now apply for unsecured credit.
Item(s) for Sale:
JL Audio C5-650x
Item(s) Description/Condition:
Used but in GREAT condition. Woofers have some Dynamat gunk from installation.
Price:
$200 shipped to the 48.
Shipping and Miscellaneous Item Information:
Will ship in original packing for safe shipping via FedEx ground...
WII White Console (soft modded) w/EXTRAS - $200 Shipped in the 48 states.
WII is in great condition. Any questions please ask.
Includes:
WII Console
Western Digital My Passport Essential 500 GB HD
2 X Controllers
2 X Nunchuk
1 Classic Controller Pro
Sensor Bar
Power Adapter
Rocketfish...
The HU in general is basic, the layout and Ipod control are excellent. If you want this HU to have more functionality you need to add optional attachments. I would recommend the H100 imprint unit for more audio control.
For other options, Kenwood has the KIV-BT900 coming out and Pioneer has...
If I understand correctly, it seems the OP wants better low end response.
I had a single G5 in the sealed box with a radiator made by Boston, and I didn't like the low end response, it just wasn't there.
There are a lot of factors why people choose a brand, and there are factors why people don't. Price is one, if you don't want to pay for the JL brand, then don't. Just like any other type of merchandise, you pay for quality and brand reputation.