Are you looking for a VPS or a dedicated server?
Because based on your requirements I don't see why you consider an Intel Core i7-3770, for example, as "old" hardware.
If by "modern hardware" you mean a VPS on a Intel Xeon E3v2 or v3 based server, for example, I understand that. But for a dedicated server at this budget you can't really expect much.
PS: Tier IV in Europe isn't going to happen.
They do have E3 SANDY and E2600 series as well
Price is awesome , Leaseweb got very high price.
They mention only server rental price on their website and when you will ask them to give you machine. They will send you Power+Bandwidth+Rack Space+ Server lease= $ and total would be 3/4 higher than what they offer on their web