I totally agree that the DSP power of the HD500 AND of the HD500x is less than needed, but
sorry marcwormjim, I'm gonna have to disagree with you on this:
follow me on this:
I can say with a good level of confidence that the Pod HD was the first affordable device to use freely assignable fx blocks;
any rack or pedalboard multifx I tried before, limited you to use only some kind of effects on each of the block
this means that you could not put three distortion pedals or 3 delay pedals or even an octaver and a wha in some cases
that was for the manufacturer to be shure that anything you loaded wouldn't overload the CPU
now, the ability to use for example many delays in series and parallel was one of the reasons I bought the HD500
and you CAN do that,
but, to be able to give you freely assignable fx blocks, the DSP MUST be "dynamic"
I think 8 reverbs is too much.
but two parallel chains with distortion, amp, modulation (or pitch), delay and reverb on each should be possible
and the HD500 AND the HD500x CANNOT do that!
in this sense I agree with you when you say that the HD500 and HD500x have an inadequate DSP power (and other hardware flaws)
so to summarise I don't think the DSP should provide the power to load ANY effect configuration,
but at least it should give us double the DSP power of the HD500