Europe-DNS, European & UK Domain Registration
I use Europe DNS for pretty much all my domain name registration needs, the prices are good and they give you full control over your domains.
They don’t just do european domains, they have every kind of domain available in one place including: .com, .net, .org, .info, .biz (worldwide domains) and .mobi (mobile domains) as well as country specific domains such as .co.uk (UK domains) and .ie (ireland domains).
Custom DNS Entries and Modifications as well as domain renewals are easy using their domain managment system .