Rudi,
Greg at GJS is a great guy. I have worked with Greg for approximately a year and have nothing but positive things to say about him. As Tania posted a link, there are a ton of people that are running hybrids. Some of them will be running the same type setup you are looking at (with film positives)... while others are going to be able to run just sublimation and heat transfers. To print film positives, you are going to need a RIP. If you have any questions about the RIP software (MultiRIP), feel free to ask them here. We also have a very detailed Frequently Asked Questions Page (
www.multirip.com/faq.html) with screen videos and PDF documents as well.
Best wishes with your decision,
Mark