I've owned both your Technics and the Denon. The Denon does not compare in terms of build quality. Keep what you have.
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I also owned one of the Denon's for about 3-4 months and found it very wanting. The build quality is kinda second rate. You can't replace/upgrade the tonearm, (easily anyway). It is attractive, but the sound quality was pretty mediocre at best.
As mentioned above, keep your Technics or buy a Rega, either one would be a better table.