That's really hard to say. If it were me shooting it I would say yes. I like my NT allot and started shooting it over my matrix's. The DM7 was my favorite year and really I felt mine shot on par with the very best markers I've used over the years. However the NT is incredibly comfortable and with the added efficiency it's really top notch.
Some of the reviews are warranted, most are not. I feel you will have a better experience with the NT if you read over the manual and the stickies closely. If you can try someones NT before you buy one that's always your best bet, and I would try and hold onto your DM if you can afford to own both.