I love my 1.5 80, when i went to the garage i got it from they had the 65 and my 80, gave both a test drive 80 first, then 65 and the 65 was terrible in comparison, i think i'd been fine if i hadn't tried the 80 first, had no go in comparison and felt physically restricted, going up to 60mph and there was a point the power just stopped. Although has really made me want to try a 100
Mine was perfectly quite and a dream to drive when i got it... then a wheel bearing went, got it replaced and back to a dream, not the front shock is leaking, just waiting to get that sorted as i can't wait to get it back as it was!
Being a student still running costs are great getting 59mpg and i'm not particularly light footed, not over the speed limits, but fast off the mark and fast cornering are my favourite (it also sticks to the road better than my mk3 fiesta did!)
It's a Billabong Dynamique and feature wise it's everything i could wish for except cruse-control and AC, but these were both on the 65, and gave them up for the 80. Did find out at the weekend out of the two tyre sizes it could take mines the most expensive 185's being around twice the price of the 165's, but they are nicer!
My little brother got newer Astra a few months before I got mine, and loves being smug at how much better he thinks his is! 1.7 100hp diesel with the sri trim but shuts up quickly when i remind him about my mpg, tax and the little on board computer (this really annoys him) and the £2500 extra he paid!
Sorry long post, but test drive one if u can, it's amazing, although i can't say anything for the long term running as even though it's 6 years old i've only had mine 6 months