I might not be the best person to answer this, especially if you are not wanting to spend more money than you intially intended to spend..LOL
If you have the room and the power, I would go with the M80's. Then I would look at upgrading the VP-150 to the 180. That is what I just did this week and will have everything hooked tomorrow.
Now if your budget doesn't allow that, then I would go with the M60's and add the VP-180. Several folks on here have gone that route and have enjoyed that setup.
Good luck either way.
