Personally I dont think the GS-F looks that bland really. With that huge grill, the orange calipers etc, it looks just right IMO, similiar to the IS-F right now i.e. apart from the front grill its "almost" a sleeper car, as long as you dont get the orange, blue or red of course. But then, its a GS-F so you may as well go for a crazy colour.
Pricing between the RC-F and GS-F is not much different. Considering the RC-F has £3k discounts going at the moment and the GS-F has £9.9k off, the GS-F actually works out better value for money as it has ACC and TVD as standard