Fun station/nursery run car needed - lease/buy

[Vaud]

OK. Need some extra ideas. I have Mk3 MX5 as a 2nd car. Love it to bits but also looking at other options...

Budget - 10k or 350ish a month on personal lease. Miles - about 6k a year (hence low mileage lease ideas)

Thoughts on lease:
Golf R
135i

Thougts on buying:
Megane R26
Westfield
350Z
Lotus Elise


Criteria:
Front seat space big enough for a child seat - ISOFIX would be nice but not critical
Must be okay with short runs - no diesel
MPG is unimportant as it's about 6k a year mileage
Must feel quick - doesn't have to be quick, just feel quick if you know what I mean...
3 or 5 door, not bothered, ditto convertible
RWD/FWD/4WD - don't care, I can always add winter tyres or take the Audi barge in the worst weather
Some boot space good but no more than a few shopping bags, it's a 2nd car after all.