Is it worth going for RMx/RMi series over RM?

[danlightbulb]

Gonna need a new PSU for new GPU as Im only on 550W.

Im thinking 850 W will give me more than enough headroom and the prices are not much different between 750W and 850W.

But is it worth going for RMx series over RM for Corsair (my favoured brand currently). Any other brands I should be considering?

 

[danlightbulb]

I just got a RM 650x and would highly recommend this series good build quality, beware the capacitors are huge on the cables and make cable management tricky.

Which end of the cables has the capacitors? Cant make them out at all on the stock photos on this site.

 

[danlightbulb]

Question about the cables you get with modular power supplies:

From looking at the Corsair manual, each PCIe cable has two connectors at the end. But with GPU's is it better to run a separate cable for each power connector? That means you'd then have 2 dangling cables at the GPU with nowhere to go?

What do you do about this? Nothing, or try and get single connector cables from elsewhere?