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A new Specialized Tarmac should check all the right boxes for you, including being spec'd for 30mm tires - which means it might take a 32 also. But it will safely take a 30.
The new Roubaix will take 32 with ease, although it does have a little longer chainstay length at 41.8mm. Not sure where your limit is on this.
The upper end models are expensive (north of $6k complete), but both will be suitably lightweight, even in the largest sizes. The Tarmac might break the 15lb barrier on the largest size.
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