Now we're getting into the meat and potatoes of this discussion. I enjoy driving a 535i more than the GS 350 F Sport, but if I were buying, I'd go Lexus and give up the Bimmer's forced induction torque and arguably better brand cachet.
In living with the CTS vs. GS 350 (Luxury, not F Sport) last year, the Caddy was definitely the better looking machine and had a lot of great qualities about it. I really like it, and obviously the boosted V Sport is even better. But, living with the cars day in and day out, CUE becomes tiresome very quickly and that Caddy is the only press car I've ever had where a piece of the door handle fell off while driving.
The Lexus's interior design may appear dated compared to something like the CTS, but it's extremely functional and superbly assembled. There's a belief that every switch, button and control will operate 10 years from now exactly as it does right off the showroom floor. The engineering that went into the GS is not lost on me.
Compared to the Germans, the GS looks like a great value -- and is. But Lexus has a hard go of competing on price with the likes of the new and improved Genesis. Lovely, torque and smooth 5L V8 and more contemporary (yet still functional) design inside and out is hard to ignore too.