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As above, I'd get an ED30 Stage 1 Revo, and get your Mrs a Golf TDI 140, and get it remapped to 180,(In case you need to drive it) Doesn't affect the fuel economy, and Storm Developments in Aldermaston will do one of their brilliant maps for 200 quid for that car.
Alternatively, if you've got the classic Mk4 R32 itch that a lot of us on here seem to have, get one of those, They are really special cars IMO.
Or, how about a TVR Griffith if you want a really special weekend car? They are stunning, sound amazing, and are supercar-quick.
Or, (!) An RS4. The noise is unbelievable, I'd personally go for a cabriolet, they look stunning roof down or up, and would again be a cracking weekend car.