a 5ms cycle equates to 200fps. It is probably not a good selection criteria.
I am not so certain that contrast ratio is either.
I do think that buying a great monitor is a good idea.
It is one of the better future proof pc purchases you can make today.
I like the IPS unit that mouse24 suggested.
A ips monitor will have a 178/178 viewing angle compared to 170/160.
That means that your display will not look washed out when you are not looking at it straight on.