Yes, if the reason for your upgrade is for EQ capability, it looks like your Onkyo has MultEQ XT which is the same as Denon's "Gold".
I don't know if your Onkyo has Dynamic EQ, but that is the only advantage of Denon's "Gold" over your Onkyo (if it doesn't have) that most of us would care about.
I agree, as long as the Onkyo is doing the job, not worth changing until you're ready to pay for the XT 32 with SubEQ HT. Figure out what the extra money will buy in your new TV and decide how long to wait.