@digichelle

If you are in Germany, I've often found Kleinanzeigen has a better variety, so it might be worthwhile to check it as well. Otherwise, I really enjoy having the benefits and warranty of a refurbished device.

Edit: Don't really know about the exact models being good, but I'd definitely look for a device with RAM upgradability (not sure if this has it), as this is my current limiting factor which I just can't improve.