Depends on what is important to you...
As a Micra driver I'm assuming you'll want something similar-ish?
For €7K ish you could try:
02 Toyota Yaris - great car in it's class: v.reliable and roomier than you might think
03 Seat Ibiza - a bit bigger, sportier and fairly reliable also
04 Hyundai Getz or Skoda Fabia - both fine, nothing special, do the job.
The above in fact range generally from 1.1L to 1.4L. If you're looking for up to 1.6 you'll probably have to go for an older car - but why up to 1.6L?
...bear in mind e.g that a basic 1.4 Ford Focus is probably no more powerful than your Micra. You have to check bhp more so than engine size and also consider the size/weight of the car.
Hope the above is of some help...any more pointers as what you would look for in a car?