I was there a couple of months ago.
I'm not sure there is much to keep you occupied for a 'few days' though.
Finisterre has nice walks along the beach and up to the lighthouse.
Lots of nice places to eat.
You could maybe spend a day there.
Muxia has the walk out to the Chapel on the rocks. and a few places to eat.
I'd struggle to occupy myself for a full day there.
It's really just a large village.
Why not walk between the two ? It's a nice walk.
I'm normally a 20 km a day kind of guy, but I managed it in one day OK.
Others of course may come up with hidden gems that could occupy your time in either place
I guess I'm more of a countryside person that a sightseeing in town person
Loads of places to stay. Just look on Gronze.
Depends what type of accommodation you are after and budget?
In Muxia I had a small apartment that looked out over the harbour!