the chair is nice. but about desks I can tell you some key things. Your armrests must be able to go under the chair. so you will be able to rest on the back and to position the keyboard exactly in the front of you, while your arms can rest on the armrest and the desk. the next thing is that you must have alot of space for your legs. If you are going to sit on that desk long periods (more then 2 hours) you will want to move your legs.
for more information go to
http://www.nhs.uk/LiveWell/WorkplaceHealth/Pages/Howtositcorrectly.aspx#video !
it does not matter what are you doing gaming or typing.

thats brilliant thank you very much :)