[Cheesehead]

I sold my HDX1 a while back for this very reason.
I found I could run larger sessions on my laptop using coreaudio than on
the HDX1 with a trash can.
Changed to HD Native instead and never looked back.
HD Native with a powerful computer seems to be around the HDX2 area and that was probably only limited by voices.

The extra voices and voice packs for Native have improved that position even more now.
HDX is getting a bit long in the tooth.
If you need super low latency or use hardware fx inserts or a separate board I can see the benefit of HDX.
If you work in the box Native is better, IMHO.