Hi Oriol, I'm panning on using the Renault box in my Tornado. It's a tried and tested route, with the bonus of being one of the cheapest options. There is plenty of info in this site about the Renault box, which one is the best, and the upgrade options. Also have a chat with Chris Cole, he is the expert when dealing with these boxes. I don't have his number with me but will try to dig it out.
Enjoy the build, they are challenging but a lot of fun.