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I know I know, you're preaching to the converted here but he's been sipping from the marketing chalice and lapped up the aero mumbo-jumbo (in spite of not racing). So sadly that option is out.
I should add that he has said that he might be selling around 5 years' down the line and then buying whatever is around then. He seems to be the cycling industry's ideal consumer but I'd be dishonest if I didn't admit that we all have a little urge to ride the cutting edge of R&D, even if it breaks the bank for the most marginal of returns.
gdkhgd
If he's not willing to go custom or bespoke then I'd agree with @amey that an off the peg Aethos is the best bet. Every review I've read states just how much 'fun' it is to ride and how much nicer it is than most modern aero bikes, and unless he races the aero penalties are inconsequential.