I like doing both, for the time being anyway. Of course, there will come a time when I run out of dumbells, and this would be inevitable for most lifters I guess.
They "feel" different, and it seems to me DB bench works more chest, or works it differently, or something.
41yo, 6'2", ~93kg
best gym lifts: sq 160kg / bp 110kg / dl 220kg /
c&p 80kg / dips +50kg / chins +31.25kg
my training log