Yes, now we mostly have been flying HSFX 6.0.1, but we are voting on making that our official mod pack right now. We have some members who haven't been around for a while and if they show up with UP3 RC4 we will fly that. We try to make sure everyone can fly.We host most of our own missions, so we trust each other when doing that and CRT=2 is not an issue.
As for mods, obviously we have the History Mod enabled. And lately we have been also enabling the Expert Mode mod. If the Host has the Expert Mode mod enabled, then everyone who joins needs that. This mod enhances many flight models as well as reduces the information you get on the HUD. Messages like Aircraft/Tank/Truck destroyed; Gear Up; and other things a real pilot would not get are now gone. But it still tells you if our tailwheel is locked.
As for the other mods, they are up to you. Here is my list. Some are ones that I got to work from UP3 and added myself. A couple are from Fruitbat.
HSFX history mod
TIGER Flyby's
Perfect Map Textures
Hakenkreuz Enabler
+Lens flare
+Fire smoke effect
+Distress Call Position
EXPERT mode
+FOVMod
+Z Ecran_Wide Beta 410
+GurnersHSFX6Distance