There's no real answer here.It boils down to personel preferance.I use an old Pacific 366 that I've had for years.It's now maketed by Hornady using their name.It's probably loaded a hundred thousand shells or more.I'll probably never change.If I had too however,I wouldn't hesitate to use any of the MEC or PW units or if I had lots of cash to spend,the Spolar is right up there near the top.
Expect to spend about $650 for a Hornady,a bit more for the PW and a bit less for the MEC if you're going to buy new.Myself,I always buy used a save a pile of money for powder and shot and the likes.
Dave