I've constructed my own sometimes, compounded several different bottled ones a lot & have settled on usually using Big Ron's......
Was all the rage on Smoke Ring, he's a member, a comp cook that checks in from that angle also & an advertizer......
At 1st I was skeptical......thinking it might be friends making a to-do about it, but tried some & ZING......some of the best pre-made stuff you can imagine..............
Like 1911 Ron was saying, check salty 1st........this stuff SEEMS salty right up until it gets near cooked in & then somehow morphs into a full-flavor, salt in the background deal.........
It will be salty if overloaded,I've made that mistake enough to know, but now have the amounts figured out pretty good.....
Duke's looks pretty good & you could adjust the sugar up & down depending on what particular application ( I'm not fond of sugar or sweet on beef, to each their own....)
For beef stuff, two fun additions that I've had good luck with are coffee & UN-sweetened cocoa powder.....thecocoa does not end up sweet, it a real interesting twist that tastes great......