Budget quality system?

Well, here is the plan... 2006 Superduty Crew Cab. Budget stealthy system.

Amp - JL Audio A6450

Speakers - JL Audio XR570-CSI front

Speakers - JL Audio TR570-CXI rear

Sub - Stealthbox

HU - Alpine 9856

I need to keep all the room I can under the rear seat, and there isnt any room behind the seat to speak of. I know it wont be loud, but what do you think for sound quality?

Here is a review of the amp.

http://www.audiogearreviews.com/reviews/amplifiers/review-JLAudio_E6450.asp

Channels 1 thru 4 will run the speakers and channels 5 and 6 will run mono to the Stealthbox, the speaker in it is a 10W1V2, Its one of JL audio's low end subs. According to that review the amp should be able to put 300 watts to it and 70 watts to each speaker, that is RMS too.

There are a bunch of different companies...

Stinger Roadkill, Cascade Deflex, Scosche Accumat Hyperflex, QuietCar (which is liquid-based and probably WAY more expensive than any of the others...). 

Each will have its own marketing BS you'll have to weed through, but IMHO you have to worry more about adhesion than anything else.  They'll all do the job, but will they keep doing the job when it's January and 14 degrees at 3 in the afternoon or when it's August and the thermometer hasn't dropped below 90 in 5 weeks?

And of course - everyone is going to have their favorites and their hated ones.  I prefer to do all my research and "learning" on-line via forums such as this, review sites, and manufacturer web-sites.  That way, I don't have a shop owner or salesperson earning their commision off me... 

Hope that helps.

I just found this forum. Yesterday, I installed an almost identical setup in my 2005 Ford Focus ZX3. The only difference was that I bought the Alpine CDA-9857 and TR570-CXI speakers in all 4 positions. I actually bought the speakers and head unit a few weeks ago, then talked myself into getting the amp and sub that were installed yesterday.

Amp - JL Audio A6450

First, the sound is really great. I'm in my 40s and don't listen to a lot of music that really pushes the sub, but so far the best stuff I've listened to with the sub is Nine Inch Nails "Closer" and Gorillaz "Feel Good Inc". The main reason I bought the alpine 9857 was for its iPod support, which is better than I had hoped for. I'm ripping my entire CD collection to lame encoded VBR MP3 files and everyone who has heard my setup says it sounds like CD quality to them.

I'm a complete rookie at car audio. I had a few concerns about the amp, even though the guys at the local shop assured me it was the right choice for my speakers and sub. I wasn't sure 150 watts from channels 5 and 6 would be enough for the 10w3v2 sub, and was worried the 75 watts per channel might overpower the 4 5x7 speakers rated at 50 watts max each. I'm on temporary assignment in a small Alabama town and I'm not sure the authorized JL dealer here has the best installers, but the job looks OK from what I can see. The main reason I did the Google search which brought me here was to see if anybody had posted settings for the 6450 amp with my setup.

I read the review you linked to, but I don't know enough about amps to understand how he tweaked the setup to 25 watts per channel on the speakers to get 307 on the sub. I'm a pretty quick learner with a set of manuals or online material, so if anyone could suggest a good place to start so I can get the most out of my setup, I'd really apreciate it.