If you're still looking for the monitor and can now find the HP LP2475W,
I may tell you it's a surprisingly good piece of hardware.
And yes the input lag is lower than the VA based models you named.
But beware, and I've read that many people have had the same problem,
in its default configuration my monitor saturates reds an awful lot so it
needs proper (hardware) calibration.
To me, if you plan to do something more than gaming with the monitor
you want to buy, then IPS or VA panels are good (but take into account the high possibility
of having to buy a hw calibration tool to get colors right),
if not I would stick to a good TN panel (maybe also from the same vendors you named).