Also Crollo, shit is not cheap
Really? Because I paid around $300 for a system that had diffculty maxing modern games when I got it 3-4 years ago, and $300 nowadays could at
least get you a high end graphics card that will max everything, a good mobo, HDDs and memory.
Maybe you're shelling out quite the bit if you absolutely
need a core I7 or something like that, but even decent dual core processors are what, $20 on the used market. Though, the $20 dual core I saw was for a outdated socket I believe, but even then that's pretty fucking cheap I'd say.
I personally don't think there's anything to motherboards short of searching up the specific board\understanding the manufacturer so you can know before you buy it if it's going to have problems, and just in general looking at the specs. What do you need out of your motherboard, what type of memory do you want to put in it, what cpu socket do you need, etcetera.
In the long run you'll
probably want to go for the higher clocked ram, but really for editing and gaming, I'm running off of 400mhz ram and it's fast enough. It's up to you to decide if you really need that extra speed, which probably won't be useful until much later on.
As for the amount of memory, 4GB is enough for most gaming purposes, and for editing purposes 8GB is also adequate. Anything beyond that is entirely your choice of future proofing your system.
Personally, if I could afford it, I'd go for the highest clocks and memory amounts.
Better to future proof it now, especially if you can afford to do so.