yea that monitor's really really good...it has 14ms response time which might be a bit high, personally i dont like anything above 10ms but most people dont even notice any ghosting, as for your ram question, the difference between those two is the ramspeed, the higher that number is (eg 2133mhz and 1866mhz) the faster the ram is. another difference is the CAS latency, thats basically how quickly the ram switches tasks and how long it takes, the lower the CAS number, the faster the ram...also these two ramsticks use different voltages, i'd recommend going with the second link...it has a voltage of 1.5v, intel generally has problems with anything higher than 1.55v ram sticks on their cpus. you can undervolt it if you want, but thats a whole different can of worms...also, ramspeeds and CAS latencies dont really make that much of a difference, as long as the ram sticks are 1.5v 2x4gb , just get it
https://www.youtube.com/watch?v=dWgzA2C61z4
EDIT: i think i may have just found the best ips panel alive right now...check this out
http://pcpartpicker.com/part/acer-monitor-umvh6aa003 ....this has 2x the contrast ratio the one you recommended.....i couldnt find alot of reviews on it, but the specs of this thing look downright amazing, i'll keep looking for reviews if i can find any, beware though this has a glossy screen, which kinda helps bring out the colour vibrancy but will be very reflective