Looking for a good modem

Hello, I am looking for a good modem for the Ultimate Plan.

I thought I would get the ARRIS / Surfboard SB6190 but then saw something about the issue with the Puma 6 chipset.

I wanted a modem that had 32x 8 channels but can't seem to find one that will work with the Ultimate Plan and not have  a Puma 6 Chipset.

Any modem recommendations?

Is 32x8 channels better than 24x8 channels will it make that much of a difference? 

Please help me choose the right modem for the Ultimate Plan.