Todd,
I bought a 20-series chassis for my AKSA 100 amp at the beginning of this year. It was custom-made for a particular dimension with hole, rectanguar, and vent cutouts and was clear anodized all the way around. I'd have to say the build quality is excellent. The chassis came out almost exactly as I planned and hoped.
There were a few disappointments with my order though. I ordered the optional 0.25" front panel but instead received a front panel of the next size down (0.187" maybe). This wasn't too bad, since I only wanted the thicker panel for appearance. The optional panel cost $40 extra for the 0.25" and $30 extra for the 0.187" - I didn't realize this until after I was given the invoice.
The other problem I had was that the holes on one half of the bottom panel were off by 0.25" from what I specified. Luckily this wasn't critical. I have a feeling the error was due to the way I provided the cutout descriptions. A proper drawing is recommended.
The last minor complaint is that the handles aren't that impressive. I'll probably switch them out sometime in the future.
Overall, I'm quite satisfied with the Par-Metal 20-series chassis. I've recently read about some bad experiences with Sescom and am glad my order with Par-Metal came out well.
My post with more details of the completed AKSA can be found here:
http://www.audiocircle.com/circles/viewtopic.php?t=1558
-Greg