I went through this in the last couple of weeks. After about a week of infuriating behaviour trying to get gulp/grunt working even remotely how I wanted (eg vendor stuff split so builds don't take 10 seconds) I decided to give webpack a shot.

For anyone else in this position, sorry to the gulp/grunt guys, but skip them - go straight for webpack. It's still taken a lot of work to get a config that works nicely for my usecase, but all in all the experience was really good and I was 80% of the way there in no time at all.