Be aware that the P25 simulcast reception ability of the new units is getting very mixed reviews.
That is, there are some happy people, but plenty of unhappy people as well. It's unclear at this time exactly how improved the performance is.
Clearly there are times when the decode seems fine (as seen in YouTube videos) and there are other times when the decode is terrible. There isn't yet a common thread as to when there's good decode and when there isn't. I've heard people say it's just down to luck, but I'm not sure about that yet.
At this time, there's no consumer scanner that always decodes simulcast P25 well all the time - and listening to bad decode is simply supremely frustrating, and in many cases un-listenable.
WISCOM is not yet simulcast (and I don't know of any plans to go simulcast yet), but the amount of traffic on WISCOM is fairly low as well.
Bottom line, if you can't hear what's being said, you'll be frustrated.