Shaft,
I moved to flying two Cessna 172s and a Cessna 172RG straight from the PA28 - once you get used to the different yoke and throttle, it's straightforward enough! I personally like the way they 'float' - you can take the power off a lot earlier and so far 100% of my landings on the 172RG have been made with the column at its aft stop, so just be aware of this and landing the beast is a non-event!
Cheers, Jack.