I'm upgrading my main amp to a new Alpine V12 and I want to change my sub amp to match. I was thinking about the MRD-M1005. Alpine says it does 700 RMS at 2ohm. To much for the w6? It's in a seled box. I've been running it for the past year with a Polk MOMO C500.1. Or should I just go with the MRD-M605 ? What would be the best match?