vmware ESX and volumes/aggrs

I was always under the impression you wanted to put as many disks into an aggr, then setup the volumes inside the aggr.

Here is what we are doing, and I am just trying to see what others are doing, best practices, etc.

We have an AGGR that we use for VMware sitting on a 6030 running 7.2.4 FCP. The aggr is ~ 9TB or so, usable and we have 1 volume that is ~ 5TB or so. We do not currenlty use SMVI (waiting for the budget to open) :) but we will use SMVI and hopefully snapmirror over to another filer. All VM's are windows (for the most part) The primary storage is still on 7.2.4, so no dedupe, or thin provisioning until we upgrade to 7.3.2 sometime this year. This is coming btw to a store near you...

Pros/cons to creating smaller/bigger volumes: potentially easier to snapmirror less dedupe % if we create smaller volumes (less vm's, less dedupe)

Is there anything wrong with creating 1 volume to 1 aggr and grow the volume to 80%? Am I missing something here?

We are thinking of reducing our snap reserve as well.

Yes, I have read the vmware best practices doc. VERY GOOD BTW.

Thanks in advance