I have a dilemma. I'm building an itx htpc for my family room. microcenter has a sale currently for 90.00 i3 2100, or 120.00 for i3 2125
I can certainly spend the extra 30 dollars, but don't want to waste money if its not needed?
ALSO, Ivy bridge will be coming out soon which I assume is the reason for price drops... think it's worth the wait and extra $$$??? this build is strictly for htpc purposes, no gaming etc. just streaming/blu ray etc.
Since you stated your video needs are "strictly for htpc purposes, no gaming etc. just streaming/blu ray etc. ", either HD 2000 or HD 3000 will work equally good for you. The HD 3000 would only benefit if you wanted to play some low end games. I'm assuming you are going to be using a 1920x1080 HDTV. As rolli59 suggested, the i3-2100 and $30 in your pocket is probably the way to go.
Example: I built an HTPC around a lowly Athlon II X2 245 and the outdated HD 4200 integrated graphics. Streaming from Netflix via Comcast, blu-ray, and Windows 7 x64 w/Aero turned on wasn't even a challange for it. Your choices are generations ahead of what I had.