TW, I have 1000 hrs on 1900's and 1000 ish hrs on 200's and yes, where I fly, certainly a 1900C is a glorified light twin. Years of abuse on 25000 hr+ airframes have left the old girls in a bit of a sad state. Max all up in a 200 or a C mid day in the desert and you are going to buy a farm. 285 TAS on a D is impressive! but I would love to hear what your engineer says about your hot section, because it must have a few holes burnt into it by now!
Pilot D, you asked the best flying wise.... my all time best working aircraft to fly are the C210 and B200. But the L410 is crtified 2 crew and I can promise you that that counts a hell of a lot more than B200 and 1900 time (yes they are both twin turbine and "operated" 2 crew) but the MCC time will be a huge advantage with part 61 coming into effect.
Booz, yes, Casa212 is 2 crew.
Hope this helps
Dog