What functions are you looking for that the stock app doesn't do for you?
I'm looking for another email app as well. My main concern is that both my gmail account and my work email are linked to the stock app. I need to be alerted when a work email comes through, but don't want my phone to go off every 10 seconds with all the crap that goes to my gmail account. I was assuming I could download an app just for gmail and keep work in the stock app, but I'm incredibly new to all this so I wasn't sure if that was a real solution.
Any suggestions?