A finishing stone is a "must-have", in my opinion. I'm one of the few guys that likes finishing on a very fine barber hone, but any sort of 12K or better hone would be fine. And yes, until you get very good with a finishing hone, I think a pasted strop would be a good idea for refreshing your blade once it's lost a bit of it's keenneess.

I'd also recommend an alum block to wet and rub over your face after your shave.