zzyzx,
Your choice of speakers are excellent, and I am sure you will like their performance. I have the M80s and the VP150, and the VP-150 matches the M80s very nicely. Few people complained about a sibilance regarding the VP-150, but I think this has not been an issue for the majority of the owners (? high frequency hearing loss
). Have you considered a local audition with someone who has this setup? You can also buy and return if you are not satisfied.
I didn't see a sub in your selections. Do you already have one or thinking about it?
John
