If you're going to plane the head, you're going to dis-assemble it.
If you're talented enough to get that head off and back on and the bike running, you can change the valve seals (if those seals are typical Honda seals, I would use Yamaha seals when I put it back together)... and once you have it apart replace all the seals (they dry out with time and your valve gasket kit will have 8 seals) and do a valve job. I would also replace the cam chain.
Any monkey with a hone that knows what they're doing can hone the cylinders but I like them done on a Sunnen hone.
Any (car) engine shop can plane the head and hone the cylinders. I'm in the west end and I know Gord Bush (he will be EXTREMELY busy, but if you are going to continue screwing around with motors Gordie is someone you WANT to know), Cooksville Engines (try to talk to Dad if he's still around), Active Engines.
If you're looking for someone to do the labour, again in the west end, I would go talk to Bent bikes (this is a time limited recommendation but Stevie Lewis is working out of Bent these days) or in the east end there is Willie at Wasp (he has built some killer baby superbikes).