only 200MHZ less and u run it quieter? lol hell yeah i would go for that
i have 2 OC profiles on my IVY 1.3V 5GHZ OC and 4.5MHZ OC @ 1.2~
i also have my Vapor-X 7950 @ 1300/1900 and i cant notice anything going to 5GHZ from 4.5GHZ unless im playing Dayz LOL
and well haswell is at least 10% faster than ivy clock for clock so yah i would go for 4.6GHZ low voltage less temp lower fan noise
and make sure the CPU never goes above 80C for gaming u want it to last at least 5 years 24/7
MAX safe temp is 1.3V or 1.35V if the temps are cold
max safe temp is 80C for 24/7 if u want to live long
thermal throttle temp @ 105C / shut down @ 125C~ for 22NM CPU