I'd vote for the CM 690 II advanced.. It has a better feature set and enough fans to keep the i7 system cool even when overclocked.. The only reason you'd want the scout would be the transparent side panel IMO..
I have the Scout and am looking to UPGRADE to the 690II Adv. In my opinion, other than the handle, the Scout has nothing that compares to the 690II Adv, feature wise. If a clear side panel is what you want, CM already released one for the 690II (~ $25 USD). The Scout's window isn't all that great, anyway, it gets noisy once you mount fans to it.