KRK'S either Sinamex at Peace Centre or go to Hung Bros at Sim Lim Sq. think they still have limited stock. grab it while u can.
they are 5 inch cones so i think they are ok. abt same size as the samson resolv50a. or just go to their webbie to check dimensions lor.
Games - well, u ain'tgonna get ur thundering explosions and stuff like that. so nope, not good for games.
Music Listening - can lah i think. but like i said, if u listen to techno, dance etc...u will be disappointed.
actually, i think u'd be better off with a good pair of monitoring headphones and a good set of computer speakers. (e.g Sony 7506's $200? and Klipsch GMXA2.1 $270?), based on ur requirements. both together will cost u same price as the monitors!
cheers.