1- yes but watch your core voltage. Anything below ~70'C at 100% load should be fine.
2- the fix for this was to disable PLL Overvoltage on my Asus board.
3- remove or replace the load fans with quieter ones, maybe with more air flow as well.
4- The HAF X came with an adapter cable that ran out the back and plugged into any 3.0 port there to enable the front ports. Maybe there is one in your case, if not contact cooler master support.
5- you could go cheap and add a coffee maker, or go all in and set up some custom water cooling loops.