It depends if he is overclocking his ram, if he isnt then he doesnt need anything special.
That monitor will not be good for games because of the 16ms, you want 8 or at least 12ms with a DVI input. I suggest the Hyundai L90D because it got great reviews. Its a more expensive than the other monitor at $330.
For your video card, go for the LeadTek like TriFid said, Its quality and has a very big Heatsink so you wont have to worry about cooling.
I heard that the Audigy ZS Gamer is bad but i don't know personally, you could get the Audigy 2 ZS OEM for only $70 though and the $50 could go towards your monitor.
Your Hard Drive, I dont know if Samsung is good so I cant really comment, i just know that western digital and seagate are the best.
Link to your case? Does the powersupply come with the case?