Well, I can only speak from personal experience and the Dell 24" monitors are pretty good for the price. I have two of them personally (one at work, one at home), and I have four of them for our engineering computers. They have 1920 x 1200 resolution, and they are crystal clear.
Regarding graphics cards, I swear by Nvidia graphics. I have two EVGA GeForce XFX 260 896MB hooked up in an SLI configuration, and it is amazing. They are a pretty good deal, and they run everything VERY well.
With Blu-Ray, I wouldn't know. I apparently sided with the superior but underfunded HD-DVD and will not buy Blu-Ray until it is the dominant video format and is the same price as regular DVDs. Also, be sure that you get a Profile 2.0 player, because the Profile 1.0 and 1.1's can not do everything Blu-Ray claims. You can read more about it on the Blu-Ray wiki. I think you can tell I am a little bitter...