KKM is my choice. Having used both KKM & LWD, KKM us higher quality and fit and finish is better. KKM is manufactured by the owners they have control of quality, LWD is outsourced and I am a made in America kind of person. Dont like Cartoon characters on my barrel hood nor having to pay not to have it.
LWD is a decent product for the money. Have had good and not so good experience with LWD. KKM on the otherhand KKM has been perfect 6 times over.
I'm with Texas48 and g29guy. Ima big fan of KKM. The machining is simply superb and the overall fit and finish SPANK the Lone Wolf's heinie. I won't buy LWD because of the cartoon dog picture and the paying to have it left off. I'll go with KKM every day. Fast service, perfect product.
No experience with Bar-Sto barrels but I've HEARD they are not always drop-in. I'll be damned if I order a part and then have to take it to a smith to have it fit to the gun. Did I mention KKM makes a great drop-in barrel.
I own four KKM barrels: G20 10mm, G20 .40 S&W, G20 .357 Sig and a G29 10mm. All four are standard length (for their respective gun). I also own 1 LWD barrel. It is a 6" G20 9x25 Dillon.
I can attest to the quality of the KKM. They are works of art. The LWD, not so much. And that hideous dog (wolf)! Arghhh! However, the LWD did fit like a glove so it probably perfoms just as good.
My only REAL hangup with LWD is when I bought one for my G29. I have read that LWD provides better chamber support than KKM so I decided to give LWD a try... even though I already had three KKM barrels for my G20. Well, when I got it I was dissappointed. The chamber suport was the exact same as my stock barrel. (I still don't know if it was a screwed-up barrel or not -- I can only assume it was.) I sent it back and got a KKM instead. The KKM was supported as expected: much better than stock and up to par with my other KKM barrels.
I will add that my LWD 9x25 Dillon barrel for my G20 has WAY more support than my other KKM barrels (almost 100%), but I think that is due to the 9x25 design rather than it being LWD vs KKM.
If I had to do it all over again, I would not change a think. I would go with KKM. The extra $50 per barrel does add up though...