From a cost and performance perspective I think folks have said they were pretty happy with Polk MM6501s and a Pioneer PRS-D800 amp, though not specifically together. The D800 is a super small amp and only 160 bucks.
Many people have the DB6501s, however, to me the MMs seem better when amp'd for only a little more. MMs run about $220 at SonicElectornix.
Polk Audio MM6501 6.5" Mobile Monitor MM Component Car Speakers
Best price I've found so far.
Amp avail there too:
Pioneer PRS-D800 300W RMS 2-Channel Class FD Car Amplifier
Marginally cheaper through Amazon:
Amazon.com : Pioneer PRS-D800 Class FD 2-Channel Bridgeable Amplifier : Audio Component Amplifiers : Electronics
Thinking about this setup myself except I'm leaning towards a Polk amp. Basically the same specs but the Polk has pass-through too so I can tag on the sub amp when I put that in. Should have the right amount of power for the components.
Polk Audio PA D2000.2
Polk Audio PA D2000.2 (PAD2000.2) 500W RMS 2-Channel Amplifier
If you're running wire, make sure you're running a large enough main back and then you can use a power block to feed both amps. I'm looking at a 1/0 true gauge kit so I can feed two 4 gauge leads to the amps.
I have a JL 10w7 and JL 500/1 amp that I'd like to find a classy way to get mounted in the Z but I'm going to start with the components and sound deadening.
Looks like $577 shipped with the MM6501 set, Polk D2000.2, speaker wire and the dual amp kit. Haven't yet pulled the trigger but I won't hold out much longer.
If anyone has quality+value amp kit or speaker wire recommendations I'd be interested in that. They can be pretty pricy but not somewhere you wanna go cheap, so some personal experience would be great. Especially since cost != value.
My two cents, based on research I've done, but would love some feedback on the above as well.
Pope