I was thinking about a microtop die when I got into handloading. I erred on the side of economical though, and got a standard seating die.
I load for one caliber but shoot 5 different bullets which all get seated differently. Adjustments are fast by dialing out the die and dialing it back in on a labeled (berdan primer -- no wasted good brass) dummy round I seated to the depth I wanted for a particular bullet.
I can switch depths in < 10 seconds, which is probably about as fast as with a microtop die, and I got to use the extra $$ to buy more bullets.