All non-hacky options are either expensive or not hollowtech.
The FSA Omega is the exception to that, but has weird BCDs (120/90 mm). Weight is comparable to the 6603 so not too bad
I have 6603 sub-compact with SPA 42/30 chainrings on my genesis, its great! Ugly though.
I have one set up as a triple on my Space Horse, it's great there too. Not too ugly compared with 6703/X800 stuff - just remove the logos/lacquer and polish it.
@amey started
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The FSA Omega is the exception to that, but has weird BCDs (120/90 mm). Weight is comparable to the 6603 so not too bad