I'd possibly go for a Golf R20 if it wasn't so much money for a 4 cylinder hatchback (no idea what the back seats like).
Back seats in a Golf are excellent for such a small car. If you are looking at R20 range you are in a better place with VW than Audi cost-wise.
I don't know of any 5 seat luxury cars in Audi A3 size though. I tend to think A6/A8 for executive class, at a much better price point than BMW/Merc etc
Would avoid all Lexuses (Lexi?) though - never driven one with any performance to speak of.
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Rory
MkIIa, blue lit buttons, memory upgrade, 1Tb in Subaru Forester STi
MkII, 240Gb in Mark Lord dock
MkII, 80Gb SSD in dock