I am looking to by myself a used regulator (which I will have serviced). I have a budget but I want the most for my money. I was looking at the Mares 52x Fusion which seems to be highly regarded but not seen as much (I dont know if Mares equipment can easily be serviced in the US) for the classic MK25/S600 combo. The Mares is a bit cheaper but seems to be a bit higher regarded than the Scuba Pro, I was wondering if anyone had any feedback out there. I would love to listen and learn.