While not exactly the same I was in a similar position around a year or so ago. (Networking Space). I also loved the fact that I was exposed to both sides of the business but felt an urge to advance more rapidly technically. The right answer for me was to slowly move out sales into more technical roles i.e. SE > Support > Ops. The way I figure it, I can flex my non-technical skills later in my career. However in the immediate, grind on my technical acumen.

Obviously only you can make the right decision based off what you think is best. Just don't be gun shy to do so.

2c.