There is really no comparing the MTX subs with the Alpines (if you are talking about the type R subs). I have 4 10" Alpine Type R subs in my car right now, and they are without a doubt some of the best subs I've used (and I've been through some subs). They do require a little more power than the MTX's though. So I couldn't really recommend you get the Alpines until I know what amp you are gonna run on them.
ha..... either MtX 6000, or 8000 series two-channel amp.
However, there is a 760watt Pioneer amp for sale this week for only $170.........
So this week Im am once again debating....
1.)MtX 6000 or 8000 series subs and Amp
2.) Pioneer Amp?
3.) Alpine Subs?
How much are two-channel alpine amps anyway??
a few things:
first. the pioneer amp is 760w (peak, according to the website) which means that RMS will be about 380w (if you don't understand why i can tell you).
second. i compared the 6000 and 8000 series amps and which one are you thinking? according to the website they list 2 different wattages per amp(12.5 volts and 14.4volts, you most likely will be running 12.5 volts so you need to adjust accordingly)
third. when you go look at amps ALWAYS read RMS power, that is all the power you can get out of an amp.
finally it sound like you are going to have a bass happy sound for your car what are your plans for mids and tweets?
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cranium
When push comes to shove, my car is uglier than yours.:)
I personally haven't been too impressed with anything from Polk Audio since they got rid of the Db and DX series. Even the Polk Momo's leave a lot to be desired (especially for the price of them). Their mids and highs now are mediocre at best. Their new GNX or GXR seiries subs just don't cut it in my opinion.