Nice looking setup, Howie!! That panel looks like some of the things I had my head/hands in 8 or 10 years ago, only the controls were running 35,000 Tons of Chillers, Cooling Towers, Plate and Frame Heat Exchangers, etc. It's been a while for me though...
The radiant heat is definitely the way to go...almost whole house. If you've got to use a Heat Pump for A/C, geothermal is absolutely the best way to go if you live anywhere other than the very deep south...even then, it's more efficient than air to air could ever be. It's just expensive to install...
Looks like you've got a good system design there...something like that will add mucho value to your house, so it is a good investment as well.
Oh, by the way, it's been in the 70's here for the last two weeks, the Azaleas are beginning to bloom, Dogwoods are about to start, and the trees are beginning to bud. Of course, what comes with that is pollen falling so thick that at times it looks like it's raining yellow, but that will be over soon. Today it's 60, and tonight in the 30's, but warming back up tomorrow into the mid 60's and sunny, and next week back into the 70's.
Ya'll keep all that white chit up there, ya heah?
