I asked a simple question, which you did not answer. You stated,

Quote - We either chose a way to upgrade before the next version comes out or we are out of the loop forever.

I assume by your lack of response, you have no such knowledge, though you state as fact an apparent unknown. 

That said, it's clear from this thread, and Pninia's timely questioning of e-on's representatives, e-on is approachable regarding upgrades. Even though no upgrade price is posted, I suggest you take it up directly with an e-on sales rep, and perhaps, with the right tone of voice, e-on may accomodate your request.