Not sure that I can really help here, but here's what I have to say. We've been using Hubspot for a while, but for marketing. We had our blog there, we were monitoring social media using it, etc. It is a great all-in-one tool.
I personally use Yesware and I love it! But I use it just to track email openings.
My advice is, test any software you think of buying. It is the best way to know if the software fits your needs. But before looking for one, make a list of features that you think the software has to own to increase sales productivity. What you want to do is find a tool that you can use to its whole potential. It's very bad when you use 2-3 features but pay for 15.