wimpy

Try to factor in the motherboard and ram cost. In norway there is a 16% price increase with 1600, DDR4 and B350, or 24% increase if only buying 1600 and B350.

You may have to go into the bios to adjust the fan curve / volt?

Yes, 4 pin splitter. But you May notis that only one side of the splitter is connected with all 4 wires. This is only the speed signal from the fan to motherboard, this would be wrong if every fan reported speed.

http://www.ebay.com/bhp/4-pin-fan-splitter Any splitter will do. You only need to make sure you don't exeed max watt/amp per header, but should not be a consern on 2-3 desent fans.