I fly an M20C. I get 150 kts TAS anywhere between 7 and 10K ft burning 8 gph. Mine is an exceptionally slicked up Mooney, and that means it's fast and efficient. At $50k valuation, make that cheap, fast, and efficient. I only carry 52 gal useable, but that's more range than my bladder so enough.
In addition to the above, I like the fit and seating position in the Mooney. I also like the retractable gear. I think they just look cool.
I'd not turn down a ride in any airplane, but I love owning a Mooney.
What mods do you have? I'd guess all of them! I had a '75 C model (with the "dirty" wing) and it was a solid 135 knot machine at 9.1 GPH over the 1,000 hours I flew her. That was with the 201 style windshield that was supposed to be worth 5 kts, A buddy had a stock '66 with the clean wing and had me by 5 knots (140 knots) at the same power setting.