If you have the funds for it, buy an NRX+ or Steez brand new from TW, try it out for a couple sessions side by side with your DX. If you are impressed, keep the one you want and return the other, or return both. Their return policy is pretty solid and no hassle.
Something to note, the DX743 felt better balanced than an NRX+ 843, even with the DX's extra 4" and heavier weight. I was surprised when the noticably lighter NRX+ felt tip heavy.