amp choice

I have a TS-W305C pioneer  12" 400RMS 800MAX subwoffer it is SVC (4 ohm) and i have a choice of amplifiers. 

The Pioneer GM-5100T is a two channel amp producing 380W x 1 RMS and 760W x 1 MAX

The Pioneer GM-D510M is a mono block class D amp producing 300W x 1 RMS and 600W x 1 MAX

Now here comes the big question, which do you think would perform better?  Because the second amp is class d will it be more effective even though it produecs less power then the bridged 2 channel amp? Any ideas and input is greatly appreciated, as christmas time is great for demanding nice shiny new amps from people

First off don't pay any attetion to max because they will never produce it. And IMO i would never buy a pioneer amp. And there subs aren't any good either i heard the Pioneer spl3000 in a sealed box on a older kicker amp getting about 600 watts rms to each. earlier i heard 2 Kicker cvr's in a sealed box on a Rockford fosgate Power 851s and that sounded better and got louder. oh yeah the pioneers were in a built box to the specs in a nissian Sentra and the kicker were in a honda prelude.

and that question you asked i would go with the 4 channel amp and what kind of speakers do you have, all one size  or like 61/2 in the front and 6x9 in the back

Well firstly i only want good sound, its not for comp or anything, just for average use of my car.  The speakers are all 6 1/2 inch.  What sorta amp would u suggest then?? The sub is fine atm but i wanted to upgrade to an Alpine or Clarion top model 12" in the near future

JL audio or kicker sx series that are my favorite 4-channel amps both are really good