I looked at an A36 also. Very nice, but it was about double the price, not significantly faster, and used about 1.5x more fuel at UK-type low levels where the TAS gain isn't much.
Not sure I believe 1.5x the fuel burn. According to the book figures I have, A36 has a 285 hp engine and offers 162 KTAS on 65% power. The TB20 has a 250 hp engine and offers 158 KTAS on 65% power. If you assume that the A36 would do 158 KTAS on 62% power, that's 177 hp for the A36 vs 162 hp for the TB20. So I might believe that the A36 is 10% draggier at the same speed, but not 50%.
(If you want to save 50%, you need a Mooney...

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