I don't know if you have ever had your sitbones measured, but I currently have the 145mm 2012 Selle Italia Max SLR Gel Flow saddle with my sitbones measured at my BG bike fit for 143mm saddles. My current saddle is pretty flat and even less "domed" shape than the Specialized Jett saddle. The 2012 Selle Italia Max SLR Gel Flow saddle is even firmer than my Jett saddle. In fact, I felt like I was sitting on 2 rocks for the first 2 weeks. This saddle has a HUGE cutout, so I do not have any soft tissue pain compared to my previous Jett saddle. Currently, the new saddle still feels firm and uncomfortable, but less hard than before. However, I have only ridden about 100 miles on my new saddle so far. As I yet have 7400 miles to go in order to match your 7500 miles on your saddle, maybe the new saddle eventually will soften up.
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2012 Specialized Amira Elite, upgraded carbon handle bars, Jett saddle 143mm switched to 145mm 2012 Selle Italia Max SLR Gel Flow saddle

2011 Specialized Ariel Sport,suspension post,Serfas Rx Women's Microfiber saddle