What diameter small wheel are you getting. I'm thinking one inch would be a good size?
by far, the most popular size small wheel is 3/4" followed by 1" for finger notches. These two sizes outsell all the others combined.
The smaller the radius wheel, the more bumps/divots you will see. Good technique will help minimize these annoying little light refracting divots but using a metal roller vs a poly or rubber wheel is a losing contest. The metal rollers will nearly always show "divots" as you work around an arc. The poly or rubber wheels minimize this and give you a fighting chance for a smooth grind.