Just remember this, the 2 main causes of system instability are cheap ram and a cheap power supply, dont skimp on those 2 items, they are the key to stability
For trading you want quiet and reliability. You don't need video power... and in most cases, you don't need much CPU grunt, either.
Asus a very good stable motherboard. Who ever is advising you is talking out their ass. Stay away from enermax products. Just order system you can afford and is good enough for trading and spend the nervous brain power on making money.