Out of Frequency Range

Dammit, you get the idea though.

I'm going to calculate it between what I have to spend now (may need to do some budgetting somewhere) and how much of it I can spend.

Built-in speakers sound cool and all (along with higher resolution), but not sure if it's worth the extra $30~$40.

Built-in speakers are generally garbage and are usually a gimme. They're hardly a point to consider as to what raises the price of a monitor. Not useful for anything except HDMI-Audio for your PS3 or 360 in my opinion.