Howdy.
For a 150mi mission, the speed of an SR22 and the complexity of a Mooney are overkill. What's the difference between 1.0hr and 0.8hr on a trip, especially after you add preflight and postflight, climbout, pattern, etc.
The differences in cruise speed will be lost in the background noise of other delays and time expenditures.
That said, I'm an airplane owner, so I know reasonableness often yields to "I want it!"
Seriously, a Cessna 182 is probably a good fit. Comfortable for pax. Lots of room. You can take one more pax than you called out in your post (added flexibility with pax and cargo). Stable IFR platform.
Your choice of buying a 2000ish Skylane and eating the depreciation, or finding and older one with the avionics you like and getting it painted, new interior, whatever else.
At worst, you put avionics in and eat the loss of unrecoverable investment, or eat the depreciation of a newer 182. The newer 182s don't have the useful load of the older ones, but if appearance in important, the new production 182s do have the "wow" factor and a really nice interior, plus a well integrated avionics suite.
The only downside is that it has a newer Lycoming, and I'm still mad at those guys for the crankshaft debacle.