I have narrowed down my choice between Alpine spx-177R or Alpine Type-R SPR-1. Out of those two choices what should I get. I have a kicker kx650.4 to run them with. Help me decide

 

I just recently replaced my Boston Acoustics 6.5" Rally Series components with the Alpine Type-R 6.5" components and am very happy with them. Their midbass reproduction is outstanding IMO. The Boston tweets might be just a tad smoother but with the windows down, the tops out and the exhaust rumbling you can't tell the difference.