You've picked the wrong thing to scrimp on. A poor quality (read that as cheap) or under size PSU has the potential to affect every part of your new rig in ways that are undiagnosable except to replace the PSU with a quality one of proper capacity. Save money elsewhere.
Except that every PSU that has been mentioned in this thread is high quality enough for the sort of build the OP is describing.
The P8H61 is a mini-ITX motherboard so no chance of OP ever doing SLI on that.
Asus' Mini-ITX motherboards model names have the suffix 'I'. mATX motherboards have the suffix 'M', therefore it is a mATX motherboard. But you are right that he can't SLI/CF on the P8H61-M LX, this is because it uses the H61 chipset which is not capable of SLI/CF and it only has one PCIe x16 slot.