I'll be the first to say it. Speakers are the most subjective part of a system, either you like them or you don't. I love my Monitor 11's and so do most of my friends, they are comparing them to mini systems, while I've heard better but can't justify the cost. When I can upgrade my Surround set-up I'm sure that Digm will be in the top 3 choices.
But you might not like the sound at all. Now on that note, what are you listening to it with? Just the Polk towers? The difference in the two brands could actually be what you don't like. The timber may be far enough off that you can notice it and it's not pleasant to your ears. I say give it a little while and see if you like it. If you can maybe barrow some speakers from the Monitor series and see if that setup sounds better to you.
Only you can tell if you don't like it. Oh... and I love Digms and don't like Polk at all but I'm still telling you that to you and I'm sure others out there Polk's sound better.