Major upgrade from Rega Apollo: Which one?

Hegel HD 11 an excellent DAC, much better than many ou there,
Just no very well know in the US.
Super

You might want to consider an Oppo 105.

I'm using the Oppo 105 and can say it sounds quite good.
I'm back with the vaunted BAT VK-300SE and finally have music again (after a five year wait).
At this point, the 105 isn't as glorious as my former Apollo but this may be due to its newness.
Also, I may have some bargain basement tubes in the 300SE.
The "good stuff" (30 year old Reflector 6H30s) sell for $600 per matched pair.
Somebody Puleeeeeze buy my Hydra (please, pretty please...)

To Mountainsong, Unfortunately the Hegel DAC is too expensive, and I can't be certain of how much improvement it will offer in my system

To Celtic66, To day, I have heard from members and one or two online dealer that the MM "My DAC" will make little difference in the sound of the Apollo because the Apollo DAC is very good and superior Therefore as Pat70 and Mountainsong have suggested the Hegel HD-11 may be the answer. Do you know if there is something better tham MM "My DAC", but not as expensive as the Hegel?? Thanks

Just to add my 2 cents...

I went from a New Rega Saturn to a used Meridian G98DH transport I found on Agon, which I coupled with a rather modest MuFi VDAC-II. Sound improvement over the Saturn was epic. Total outlay for the Meridian + MuFi was a little over $1200.00.

It's worth noting that G98DHs are transports and require a DAC. FWIW I was able to compare the G98DH with an Ayre CX-7e and a Naim CDX2. The Naim at $2700 used had the best sound, but I also thought the G98DH was superior to the Ayre Demo Unit priced at $2500. At less than half the cost of the CDX2, I was very happy with my decision to get the Meridian. As always, YMMV.