Luminary :
The Nano S can support PSU's up to 160mm deep, the RM750ti is 180mm deep, so I'm afraid that particular PSU looks to be too big.
The EVGA 650w G2, however, should fit just fine and is another very well made unit:
Power Supply: EVGA SuperNOVA G2 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($89.99 @ NCIX US)
Total: $89.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-10-19 23:06 EDT-0400
Hey,
I got the impression he already had the PSU.
*Make sure you have a microATX or mini-ITX motherboard, and that your CPU cooler and other components have no issues.
Some cases don't have DVD/BD support either so make sure it all fits.