just joined the site today after purchasing my 54 plate 1.7 astra sri last week. I part ex'd in my 54 plate smart roadster coupe as we needed the second car in the household to be able to pull its weight (really all this means is that it needed to fit the dog in it).
I scoured yorkshire to find a decent low mileage diesel and came up with the astra (35k on the clock) from pentagon in burton on trent for under £6k. Luckily I found a version with cruise control and climate control and am also protected by a years network Q.
I know the 1.7 is not everyone's favourite diesel on here (the majority prefer the 1.9) but I've clocked up around 500 miles already (new year break in Northumberland) and am very satisfied with the car. It's smooth, economical, quiet on the motorway and has enough power for me. Plus the well designed boot means the dog has a shed load of space!