In short, yes, go for the G27, its a great wheel and you wont regret it. I've had my G25 for 3 years now and it's still running perfect. The G27 is an improved version of the g25, and i've put in a good 12 hours in total with it because my friend has one, and I love it.
I'm in the same timezone as you, and there are plenty of drivers on from early in the morning until around five or 6 at night. This is because the majority of players live in europe, and their nights start a couple of hours before ours do.