Exeo isn’t based on the old A4. Its based on the old, old A4 (popped up around 2001 – the 2005 > 2009 was nothing more than a facelift). I’d steer clear or just get an Audi that its based on – it’ll be cheaper and looks prettier.
I’ll stick in a vote for the Octavia. I’ve got a mk2 petrol vRS estate and its great albeit a little thirsty but I can cope with that. Going to get a FL version sometime this year. But, just before we got it, we hired a FL version (boggo standard diesel hatchback) and did about 2000 miles in it in a fortnight down to the south of France and back and it was excellent. Frugal, fine on the motorway, big boot (big enough for us to consider a hatch next) – the only thing it was lacking was a 6th gear for 80mph autoroute cruising.
Mazda 6 looks good – I kinda fancy a 6 Sport estate but find the dash horrific. Shame…
Mondeo is always a good shout. I’m going to have to have a good poke about in one of those before we get another Octy. Passat – my dad has just got a new shape saloon. Interior is very nice and the Bluemotion shizzle is nice on the tax front. Expect you might just squeeze in a new shape estate for your budget. Seem to hold their prices pretty well too.