If you can afford a JetProp, go for one of those. Why are you even considering a Cessna 182?!
On the M20K / Acclaim question, yes there's quite a difference. The Acclaim is considerably heavier (MTOW 1528kg vs 1315) and it has a stretched fuselage giving more leverage for the much bigger 280hp Continental TSI0-550 stuck on the nose vs the 210hp TSIO-360 on the K. All with largely the same suspension.