What street unicycle to buy

I have been unicycling on and off for 2 years now on a very basic ebay unicycle and I will have time this summer to unicycle more, I want to get into street unicycling and am completely lost as to what unicycle to buy.
Bearing in mind that I don’t want to spend more than 250 euro.

You can’t go wrong with either a Nimbus trials or a Nimbus 24 with a slickish tyre IMHO.
I’m assuming your not in the UK, but if you give UDCUK a call or go on their livechat I’m sure they’ll be able to help you out.