sub, amp 3 choices

I have a new 2010 Challenger that I want to add some subwoofers to.  I've got everything narrowed down, but I'm having a hard time making the final decisions.  Any helpful information is appreciated:

Amp: Sony Xplod XM-ZZR3301 or Infinity Reference 1600a

Same RMS power, the Infinity is approximately $100 more.  It has a cool blue light on it, but its not worth $100 to me.  Is the Infinity amp that much better?

Subs: Kenwood KFC-W2512 or Alpine SWE-1043

I can get them for about the same price.  The Kenwood can handle a little more power, but I think either would be fine with either of the amp choices.

Where to buy: Crutchfield or Sonic Electronix

I talked to a guy at Crutchfield, he was very helpful so I'm definitely getting my subs through them.  However, the amps are so much cheaper at Sonic.  The Sony is $70 cheaper (I can get it for $129).  Fropm the reviews I read, both places seem to be pretty reputable and are authorized dealers.  Does anyone have good or bad experieces with either of these places?

If it were my decision based on these suggestions I would go Alpine. I have never heard anything bad about their products and they just ROCK. I won't bash on the others, just wouldn't buy them. haha

I have purchased from Crutchfield (many years ago) and recently purchased a JL fuse block from Sonic. So far, both very good suppliers with no know bad history.

Thanks for the info, it will come in very handy.

To answer your questions: Stock radio (2010 Challenger MyGig system), 2 subs, sealed custom-made fiberglass boxes (one on each side of the trunk, tucked into the wheel wells like the JL Audio Stealthbox).