I am always confused - I don't worry worry about it!!
Just to give you an idea - 7400 brake levers with shifters - sti's or brifters (i think brifters is frowned upon) are expensive, very expensive. I was looking for some but gave up due to cost - NOS or VGC ones are around £175 from memory. Ultegra should be cheaper and i don't know an awful lot about them. I think i read that it is possible to mix Ultegra and DA calipers but take advice on that.
These are 7401 levers -
And i think if you click on the pic it will send you to my other DA bits and bobs.
There are many variations in aero levers, SLX being one, as seen here -
Again, click on the pic should show more.
And i am pretty sure i have Exage levers somewhere.
Confusion is normal, there are plenty of options but perhaps you should consider the cost of the DA stuff first. Unless you are a millionaire!! LOL
There are plenty of options for you, it is just the balance of cost vs want as always.
I know what I'm after mate . Just aero brake levers , like the Dura Ace ones you showed , or mayybe Ultegra . Not sti levers I already have down tube shifters .
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