Let's see. Had a 19, 23, 27 and 26. Bought conversion barrels for the 23 and 27. Sold the 19 and will sell the 26. Netted $500 on the 19 (had add-on bright sights) and will sell the 26 for $500. Conversion barrels cost $135 each ($270) and will have netted $730 on whole deal. Sounds like a good deal to me since I have "a few" 9mm rounds and they are cheaper for practice than the .40. As I get older my old hands may have trouble with the recoil on the .40 and I'll switch to the 9mm barrels.
The .40 does have some bark but what the hey, man up.