I used to run A/UX on a II (later IIfx) and I liked it.
I
didn't find it all that much slower than running the MacOS
straight.  I can even remember playing Hellcats (I think
that was the name; it was a WWII flight simulator) under
A/UX and it was pretty smooth. 
Was the version you were running a C2 version?  I was running A/UX 2.0/C2,
it was painful.
                Zane
--
| Zane H. Healy                    | UNIX Systems Administrator |
| healyzh(a)aracnet.com (primary)    | OpenVMS Enthusiast         |
|                                  | Classic Computer Collector |
+----------------------------------+----------------------------+
|     Empire of the Petal Throne and Traveller Role Playing,    |
|                   and Zane's Computer Museum.                 |
|                 
http://www.aracnet.com/~healyzh/              |