Thanks for the review! I also ride an S-works Tarmac Sl4 in size 58. A great bike in combination with Sram Red and Fulcrum Racing speed XLR wheels or Fulcrum Racing 1 wheels (when it is raining here in the Netherlands).
Although I am not convinced about your opinion on the Storck (I also have a 7 year old Storck C1.1 which is completely flawless and great ride during the winter period) as a brand, I can say the the Tarmac is as you describe it. But I think it is very good in the corners because it feels so convident. I really love the power transfer of the bike. Every pedalstroke is speed.
When I was looking for a new bike I had to choose between the Sl4, Super Six Evo and the Cervelo R3 SL. Here in the Netherlands Cannondale cannot supply a super Six Evo frame. You have to buy the complete bike. When the Cannondale dealer has connections he can sell you a Evo frame but you will have to pay a lot more money for it. So no Cannondale for me although I like it a lot. I did not try Cervelo because I knew that I wanted the S-works as soon as I hold here in my hands. The big white S-works logo on the frame does it for me.
I like the Cervelo R3 SL frameset but I think that Cervelo is a bit overpriced and hyped. I also read a lot of frame problems (in the past).
By the way...Parlee and moots I very very rare in the Netherlands and not easy to buy if you want one. BMC is not my kind of bike. They look good and expensive but for me it is a hyped brand.
I really love the Italian brands although Pina is not my cup of tea. I like some Colnago's, Williers and Bianchi's but they are all overpriced, heavy and technically not top of the bill. They sure do look sexy and beautiful painted.