Harmonic Balancers

I have gotten a few requests on my opinion on harmonic balancers. On most builds, I do not see a great need for an expensive unit. But wondered, who has up'ed the anti on this item to a ATI super damper or a TCI Rattler for there heavier hitting street strip/ride or the race machine.

For street and mild street strip rides, I have not had any issues with more inexpensive balancers.

What would draw my money to purchase one of the above (Or other not mentioned) to my build?

Also, have any of you all experienced pulley fitment issues or alinement issues with an after market balancer?

For myself, I'll (Hopefuley) be working on a 340/3.58 stroker for 372/373 cubes. And then later, my 4.0 arm stroker race mill.

What say you?