The kick in a stock FX surprised me, getting LAW RAM for sure... alot more kick than the F7 and f8 or any other electro i've shot. Could be due to the lighter weight of the FX compared to it's parents.
I've shot a G3 and G4 and both were smooth... it's really preference and price to you.
If I could, I'd own both
but I've always liked the fx look, also have an Etek3 and the FX is much lighter.