I personally dislike a heavy piano action. The Hammond keys, on the other hand, are heaven!! Maybe it's just me, but it seems that on the Hammonds the black keys go "straight down" instead of hinging from the rear, which gives it a more ergonomic feel IMO. The action is faster too. I could someday see my rig being an SK1 midi'd to the BK-7m or SD40. My $.02.