Talk to the people who have and are having major congestion issues, due to too many RSPs still doing the "unlimited" thing without backing that with enough CVCs. There's a couple or so that don't - AussieBB, IIRC and have less issues if you manage to be on-net.
However, another unmentioned issue: the current generation of issues antennas are/were had two versions: 1 only supported 50mbps aggregate, and 2 went up to 75 mbps. So, will they upgrade those (for free)? Ensure that all new installations get one capable of 100 mbps (V3?)?