Oh so better ram helps llano even more than I thought in some cases. Thanks for posting that link XD.
XD's parts list so far was at $316, add your monitor and Optical drive puts us at $482. $111 left. You could still get good 4GB ram kit and a small 60GB SSD without going over budget, or very far over depending on the SSD performance you want to pay for, if at all still.
So still staying within the same budget and getting much better parts with the A8 3870 (plus mobo combo price is amazing), your build is looking pretty sweet.
For cheap SSD capacity you can try this OCZ Vertex Plus 120GB
for $84 but its Sata2 so the performance won't be like that of the M4 but its very cheap for SSDs. And the Indilinx controller is stable from what I hear (though I know little of SSDs, just want to point that out).
You could also go with this OCZ Petrol 128GB
for $105 for cheap as well... And its Sata3 and Indilinx Everest controller. Not quite as fast but not as expensive as top of the line SSDs. But if the budget is low and you want an SSD, this would give affordable performance gains that will be noticed over platter HDDs.
Sorry I didn't have time to look up ram.