Has anyone used Mp Brakes kits and or they any better than SSBC

[67RedCharger]

I got power drum brakes and 15'' wheels and also want to swap to disks too.

SSBC sells this kit for $1360 (without groups buy) and it'll fit 14'' wheels.
http://www.ssbrakes.com/products/detail/564/?make=Dodge&model=Charger&year=1969

mpbrakes sells this kit for $1020 but requires 15'' wheels
http://www.mpbrakes.com/db1302hp.htm

now I need to know which kit I need  

You DO NOT HAVE TO HAVE 15" rims for MP Brakes to work.  I have 14" Magnum 500 rims with MP Disk brakes on the front of "Ole Red" and everything clears just fine. No problems at all.   The rims are 7" rims.

  ~ 67RedCharger ~