Corner bead on tile to drywall transition?

I have an alcove tub surround. On the 90 degree outside edge where the tiled surface will meet the painted surface, how do I treat the joining of the drywall boards... someone told me corner bead will flare out the tile so don't use it... what would I use?

Thanks!

"J" channel on the drywall. It looks like a square bottomed J, and slips over the end of the drywall. Tape and mud around it to the cbu. If you are using a bullnose or quarter-round tile, you'll have a nice flat, square edge.