a little over priced compared to what it is here in the US but you can maybe find it for a better price elsewhere. you might also be able to squeeze a 24" monitor into that budget if you can find a good price.
i have a 19" WS LG L194WT 5ms and i love it good response rate color and images crisp and sharp no dead pixels nice design
cant go wrong got it for $230AUD
If you want a bigger widescreen monitor the sweet spot is around 20 or 22" inch don't past those size if you don't want to take a hit in performance when playing games, but that just imo.