I'm happy to report that my first reason for sticking with AQTime (Support) has proven to be a good read. Running AQTime 4.40.469.0, coupled with a custom patch acquired from their support department, I now have AQTime 4 working in my environment. I like the GUI better in AQTime 4, and the service support is tons better. For example, I couldn't profile a COM service properly in AQTime 3 (using SvCom), but it works just fine in AQTime 4.
I'm looking forward to identifying all sorts of wicked issues now.
Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in any way.