I converted to a PA28R-201 after some 80 odd hours on an Archer III and didn't find it too hard. The first thing that struck me was the lack of urgency on the climbout but I soon got used to that. And perhaps after a -141 or -161 its not that big a difference (I haven't flown them so cannot comment on that).
The CS prop and moving wheels shouldn't be too big an issue. What worked for me is to decide on a set procedure (your instructor will most probably help you out with that) and stick to that!
Have fun!