well, I bought the game 3 days ago and have played it alot since. Its really good, i think GAS did a great job. The functionality of the game is amazing. In an interview with the lead designer he said it was the Ultimate War Fun Tool, and its just that. With the awesome scoping its like having unlimited satellite imagery access.
Mr. coffee,
With my rig, i am getting anywhere between 20-45 fps on average and 70 fps max. Its actually very playable and enjoyable. The graphics of course, are amazing, and it makes me love RTS games now, and i cant wait to see what future RTS games have in store. Its not quite as graphically intensive as C@C 3, but nevertheless, the open battlefields are amazing. My settings are all on high except for shadow detail, which is on medium. There really isnt all that much of a slow down. It all comes down to your CPU and ram. I reccomend 2 gigs minimum, My 1 gig is why i have slow fps. My CPU seems to handle it fine but i think it would be all that much better with an E6600.
Dual monitor support is actually what the game is made for, although you will want to have even more RAM and an even better CPU as this feature eats RAM and gozzles your CPU. I wouldnt reccomend playing this game on a single core CPU. You can even have one monitor as your zoomed in screen with all your units and the other screen as the whole battlefield map, or both as the same. But The lead developer actually said the game was meant for two monitors. I wish i had two to try it out, but like i said, the game plays great on my rig, but if i had two montiors i think it would slow down tremendously due to my ram.
Hope this helps, i can get screenshots if you need.