Two Part Dosing Pump Recommendation

[viperfish]

I need to start automating my two part dosing. I have done a lot of digging online but there isn't a whole bunch of reviews or opinions. The cheaper the better of course but I still want a decent unit. I have been looking at the Aqua Medic Two pump programmable unit for about $300, I have also come across the Profilux standalone unit for about $100 more. Then there are the bare-bones single pumps which you have to provide the timer. I also notice Bubble Magus has a standalone unit available now. Anyone have any recommendations?