I owned an Aldrich Mod from Mark at the same time as many other amps. To be honest, I thought the CAA PT-100 got very close when I AB'd them. The mids were very slightly different. The Aldrich had very very very slightly better string definition--they were close. There is on on guitar center used for 1900-ish right now.
As another member alluded to, member redplated (ground zeo amps), does excellent mods. I just purchased a Hellion but have not played it yet, however, the build quality on it is on par with any high end builder. I also have the Marshall MOAB mod which is, to me, the best modded Marshall I have played. I prefer it significantly to the Cameron Aldrich. Blake Mansfield (a member here) has a video shooting out the MOAB with the Aldrich--there is overlap but there are definite differences. I believe he preferred the MOAB as well. Blake's Aldrich in that video sounds nearly identical to the one I had.