I've not used the Flycom, but do own a set of Communica equipment. Other than the irritatingly fragile telephone plugs with which they have an enduring love affair, the attenuation and comfort are excellent. Also they are just up the road from you in Winchester, so it might be worth driving up to try a set on.
I've also flown with Lynx quite a lot, and prefer their headsets (by a very small margin) although I've found my own Communica helmets more comfortable - even with the Lynx headsets. The Lynx headset plugs are very robust but do incorporate a positive latch which needs to be undone to exit the cockpit in a hurry - you need to decide for yourself whether that's a problem.
If you are flying totally open-cockpit, whichever make you go for, I'd recommend having a visor latch and a chin guard below the visor (the former is for obvious reasons, the latter stops deeply irritating drafts down your neck). All the main makes offer these, but not necessarily as standard fit.
G