With so many different mesh chairs to choose from these days it's difficult to make a finite choice. Obviously the Aeron has to be on your shortlist and provided you're happy you can handle its firmer sitting posture it should work well for you.
However if this is a problem there are a couple of hybrid mesh Office Chair Singapore worth looking at. Both have lightly padded seats and top quality form sensing mesh backs for great support. First there is the Enix 2759 chair a very elegant looking chair which will support you comfortably for hours. Then there is the more recently introduced Lex 2861 chair.
As you can see from the photos there is an absence of the usual levers and knobs on these Office Chair Singapore as they are both self-adjusting. Apart from seat and arm height you just sit and let the chairs do the support work. And the 3D mesh moulds to your body supporting it comfortably.
If you are on a tight budget Office Chair Singapore Xena 7611 by AOF Ergonomic Mesh Chair is well with considering. It is highly adjustable and comes with a padded seat.