I guess I'd still say Lincoln.
Up until a few short years ago I would have said Lincoln, hands down.
It's probably still very good stuff, still easy to find in any real parts store, probably works just fine...................but it's not the same Lincoln I knew.
sniff,sniff (I'll be ok...).
I'm sure there are quite a few good grease guns/equipment out there. I haven't kept up with the stuff lately. Cordless and compact air powered seem very popular nowadays though.
Rob