If its the green bike and you dont want the 'hacky' look of 6603 then Sugino.
All non-hacky options are either expensive or not hollowtech.
Also White ind.
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.
@hamrack started
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If its the green bike and you dont want the 'hacky' look of 6603 then Sugino.
All non-hacky options are either expensive or not hollowtech.
Also White ind.