I love Pinnacle LE, it's a great, fast performing, exceptionally stable and feature-rich editor (in a nutshell). I am looking forward to upgrading to the new release 6.0 next month with all the added functionality that goes with it. I never used Studio 8 or 9 in the past, I started with Studio 400 (many moons ago) and then their DC10 product and then had a big break in editing and when I came back to it went straight in with Edition.
The downside of LE is the learning curve. This has nothing to do with the interface, which many reviewers stuck with pre-conceived idea all applications absolutely must conform to the same interface would suggest, but more to do with the fact you actually have to really understand more about video editing, its terminology, and all that goes with it. I think the same could be said when moving from any consumer package to the more professional type offerings (Adobe Elements to Pro for example).
What I would suggest is that if Studio 9 is doing all you need it to for now then I would say stick with it. If and when the time comes where you feel it is holding you back in some way then look to upgrade then.
Remember that by contacting Pinnacle you can get a Liquid Edition trial CD ROM. Wait until 6.0 is out though
