I wouldnt get the scar until they release the 308 version to the public. Also... the stock looks like a boot. Look at a picture of it. Once you see it, it can not be unseen. Now every time I look at a scar my eyes immediately fixate on the damn boot-stock.
The fs2000 looks neat, and the factory 1.6x optic is actually pretty clear and present to look through. I say it would do everything the scar can do... and FN has that rebate right now. The trigger just has the typical bullpup slop though.
Might want to wait and see how the ACR is received. Also look at the kel tec RFB if you want a neat bullpup rifle.