For $1K - you can do way better than a Llano especially for an office build. On a dual boot I'd say go with an Intel Core i5-2400 or i3-2120, that will be far better. You don't need 2 SSDs for a dual boot setup - if you're going for - say a Windows / Ubuntu setup you can run both OS's on one HD. You also don't want to skimp on the PSU either - I hear Antec includes good ones with their setup, but I'm still really skeptical about it.
Thanks, g-unit1111, you've given me good things to consider. Details:
Case: I like your Cooler Master HAF 912. That plus Antec Earth Watts 380 is good, but not perceptibly better than the Antec box + Antec Earth Watts 380.
PSU: Antec Earth Watts 380 is rated by Newegg customers as better than the Corsair TX650, and has enough power. My rig will take 230 watts. Looked at others in the Corsair Enthusiast line; not impressed.
Mobo: Don't trust Asrock - lately many DOA and sound problems.
CPU: The Intel CPU is a beauty - I'll look for a better mobo for your i5, or an i3 2120. The i3 and i5 crush the 3650 and 3680 on encoding/decoding, but are clobbered by the AMD cpus in game benchmarks. See http://hothardware.com/Reviews/AMD-A63650-Llano-APU-Per....
SSD: Ubuntu is now taking 55 GB; Windows and apps 44 GB. I need some headroom. Hence, the two SSDs. Maybe a single 160 GB will do.
HD: I don't need 1 TB; current 4 x 120 GB holds all needed data and 4 OS. Data backup is 42 GB. Never got RAID 10 to work with 4 x 120 GB, though...
Video: With that 6850, I'm sure the i3 and i5 ($340) would spank a bare 3650 ($110) - but that and the i5 are 3x the cost of the bare 3650.
Your monitor choice looks good.
DDR3 1333 is enough for me, but I want lots of it. I'm still gonna go with 16 GB memory, and try to run two virtual machines. I just might move to two of your recommendation, $90.