On cherry, BLO or tung oil will pop the grain. Linseed oil a bit more than the tung oil, cost less too.
My preferred finish on cherry furniture is a light coat of dewaxed garnet shellac, then a top coat... PLEASE don't use poly! Waterlox or some other HARD varnish wil be far superior. Poly is tough; but not very hard.
Scott
Finishing is an 'Art & a Science'. Actually, it is a process. You must understand the properties and tendencies of the finish you are using. You must know the proper steps and techniques, then you must execute them properly.