Fleur - Unfortunately, I would not be able to comment on the "After-sales service" for the Bubble Magus. As I have not had major issues with it at all. The only issues I had, a day after putting it to service, was to tighten the recirculating pump's fittings, where they go into the skimmer body. They were a wee bit loose, and dripped some water.....
BUT, since then - no issues at all - and I have had mine now for about 8 months....
I also know that Reef Octopus is really good. Sorry man. Difficult decision....
What pump/s does the RO come with? That new pump that Lanzo advertised recently? The Bubble Magus comes with 2 x recirculating pin-wheel AquaBee pumps. The exact same pumps as what the Bubble Master and Bubble King skimmer came out with, a while back...