I'm currently using a POD X3 Pro which I feel works very well for me. I did try an HD Pro for awhile and to tell you the truth I was kinda disappointed. It appeared the equalizers did nothing to alter the sound. When I invoke the equalizers on my X3 Pro I hear a noticeable difference. I heard practically no difference when I added equalization to my guitar tone when using the HD Pro. Have you guys gotten the equalizers to work?
Other things were a letdown as well (like the Greenbacks and I think some of the mics).
I do recall some people saying that the HD Pro requires more tweaking to dial in a good tone but they felt that the tone of the HD is better than that of the X3.
There are a few HD Pros going for cheap and I'm wondering if I should pick one up and give it another try.
I usually use the Marshall JCM800 amp since I'm into hard rock and metal. I do like the Soldano and the Engl too.