I have the opportunity to purchase a 2 1/2 year old Epic Grand Master system.

I have 2 questions:

1) The QS8 had holes drilled in order to mount on the wall. The owner said this version of the QS8's did not have pre-drilled mounts but that this does not affect the speakers sonically. Is this true?

2) These speakers are not the v2 versions, e.g. they are the M22ti. What has changed between the v2 and ti versions? Are there large differences in sound?

The sub is the EP350 (I think its the version before v3)

The center is the 150

Thanks