I was into buying the gen for a time. Although I didn't go for it in the end, I was, like you, having difficulties choosing if I should go for the PO or the black seamster 300 m or the blue version of it.
The saleswoman in Omega told me something that is really true and perhaps you already know; if you are going for an "all-around" watch which you can wear both at casual and dressy events, black is the colour to prefer. It has a more serious note to it. Not that the blue is "unserious" in any way, but I agree with her. If you are choosing between colours I would say go for the black. If you have a lot of black dials, go for the blue.
When it comes to the PO... It is a more beautiful watch imo. Though, it's harder to get the reps right due to the in-house movement of Omega that can't be repped correctly. If you are patient enough, the noob factory will release the LMPO (http://forums.watchuseek.com/attachments/f20/674922d1333920495-seamaster-planet-ocean-liquid-metal-limited-edition-img_7572.jpg) soon, which is good if you want the PO and worry about the obvious case back (this one is closed on the gen). They will also release the ceramic ones, though the movement is rumoured to not look so different from the existing ones.
If I were you I'd wait for noobs release. If you can't restrain yourself, go for the smp-c.
Furthermore, about your question, I'm not quite sure how the bezel was on the gen. I'll be visiting the AD on Tuesday next week (just for fun), and I can check it out. Will also most more pictures then!