I think Delays and Reverbs are areas that most FX units should try and shine in. The Amp and Cab models too, but that only matters to those that don't do 4CM. The common denominator is Delay and Reverb. Drive would be another "standard effect" that most care about. While my Helix arrives tomorrow, I'll surely be interested in the reverbs, coming from an Axe Fx II XL.