Go look at all the plugins from
Plugin Alliance
Softube
Sonnonx
Avid
MCDSP
Emperical Labs (Only 1 i know)
and see if you can deal with it.
if not then the Waves digi might be your best bet.
I just got a HDX card as well....and man waves did us dirty.
I would have loved to have them support the platform.
that being said, I hope sales of the digigrid tank so bad...that they eventually will.