Well Rae, with the yards I have been riding this last year, I'll probably just keep on abusing the old C3.
Technically there is nothing wrong with it that a new shell, new comfy lining and new visor and pinlock wouldn't cure.
The Sena still works as it always has and having gone back to read my annual whinge about it not charging, it is now charging like an angry bull...
This month has been a bad month for buying things; bike insurance, four new tyres for the car, car insurance, breakdown cover, having to pay the man for making me the new kitchen window etc. etc. so the C3Pro went back, more out of anger than financial need but as fitting the intercomm wasn't the two minute job I expected, it was ride without it and get lost or use the old helmet. Option B won the day.
Oh, and a new battery for the bike seeing as it was as flat as a pancake yesterday despite being on an Optimate. I noticed the red light on the charger was on last week and thought 'bugger' but then got caught up in window fitting or whatever.
I 'may' swallow my ire and get another C3 Pro, but there is no way on god's little green earth that I am riding around with an antenna poking out of my left shoulder, or wherever! I have never seen anyone with the Schuberth SC10UA intercomm. That could mean you never notice the antenna or it could mean no one has ever bought one...
If I do go back to a C3 Pro I will probably just get a new mount for the 20S as the old one is sticky pad'ed and siliconed tight on the old shell and although I am sure I could get it off, it is probably easier to get a new mount.
The C5 looks sweet and is getting good reviews and particularly Motolegends are 'dissuading' folks from buying the C4 which crashed and burned when it was first released. It also comes fully ready (heard that before) with HD speakers and antenna built in ready to have the new Sena integrated i/c clicked into place in about 30 seconds. If I decide to buy a new one I may go visit Motolegends who are offering a full fitting service for the C5 free of charge, even though, unlike Shoei who do a free exchange, Schuberth are charging for the replacement cheek and head linings. Motolegends have said they will absorb that cost, which should be minimal because what comes out of one new helmet can go into the next one etc.