This panel is probably pushing 750 contrast on a good day.
Probably? Don't you have a Spyder. Can't you measure it. Can't you try some different settings to maximize it. 750 is not that bad. That is about the same as an NEC 2490uxi.
The lack of polarizer kind of nulls the viewing point advantage significantly as well (probably also a big reason the subjective image quality is lower than normal IPS).
"Normal IPS" doesn't have A-TW polarizer. Everything Except a couple of NECs lack the A-TW polarizer. The HP 2475 is about $600 and doesn't have the A-TW polarizer. I have owned PVA/TN/IPS (with and without polarizer). IPS without polarizer still has a better viewing angle than TN/PVA. The only thing better is IPS with the A -TW polarizer, which currently ships on 2 or 3 monitors on the market.
TN panels have poor vertical viewing angles and they glow off angle as well, here is my 2490 next to my TN panel.