On that motherboard, if you hit the specs tab it says it supports ECC memory, and they also have a vendor list there, too.
I have not used ECC memory in forever, yes it is slower. However when I built this computer, I did memory test it for about 3 days (usually running through the night) because I am sort of old school in that I still "burn-in" computers when I build them.
I was just looking at monitors on newegg. I see the bigger IPS monitors have come down a little on price, but if you want 16:10 they are a bit expensive. The 30" Dell U3014 is $1200.