The Cirrus is the logical choice for somebody buying new - not a lot of options in the piston market!
As for efficiency my trip this past weekend was at 14K' at 11.5 GPH with a TAS of about 160 kts. I am sure a Mooney can do a lot better but then again that's not bad for the wheels sticking down.
If that is LOP, you must have a turbo engine to do that at 14k. If I (TB20) was able to to 11.5GPH at 14k I would be doing (ISA assumed) 172kt TAS. Your lower figure is presumably a combination of fixed gear and the turbo engine being a bit less efficient (I don't know what IAS a TB21 does at 11.5GPH but I know it is less than the TB20).