As far as my converstaions with Maxon UK tell me, you have to own ALL the Studio modules to be classed as a Studio owner. That means you are going to have to buy Net Render Module, and yes you are just an XL owner with some extra modules. Mention this to the guys at Maxon and they may help you out with a Net Render + Studio Upgrade!
The way I see it, the XL and STUDIO bundles are great for first time buyers. It is pointless upgrading later as the current R8.x XL to R9 Studio upgrade is £1199 and would not update any of your extra modules!
Its the staggered modular updates that do it! If R9 Studio revised all modules at the same time nobody would be complaining. In fact, it is almost worth Maxon sticking Clothilde into Dynamics and calling it Dynamics V2. Psycologically, this would probably play better in peoples minds - and hey presto, XL to Studio upgraders by the hundreds.
Then again what do I know…:shrug: