It depends on your needs. IPS monitors will have better colours and better viewing angles (it you look at it from one side, you will still see the pic with the same colours), but of course it's a bit more expensive than TN panels.
Personally, I'd go with an IPS one.
And in the price range of $300 or £180 (your profile says you're from the UK) you should be able to pick a 24" one like (and I read that you've already gone to a store, I just put them from overclockers to give you an idea) the
Asus VN248H_ http://www.overclockers.co.uk/showproduct.php?prodid=MO-059-AS&groupid=17&catid=510
or the
Asus VS4AHL_ http://www.overclockers.co.uk/showproduct.php?prodid=MO-068-AS&groupid=17&catid=510
Dell U2412_ http://www.overclockers.co.uk/showproduct.php?prodid=MO-052-DE
Those 2 cost a bit more but are 1920x1200, in case you want the extra pixels of the 16:10 aspect ratio.
Please excuse my bad English.
Former gaming PC: i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Current gaming PC: R5-7600, 32GB RAM 6000MT/s (CL30) and a RX 9060XT 16GB
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.
