The new Zenfone 4 seems cool, but in case its price seems steep to you, you may want to check out the Asus Zenfone 3 ZE520KL. You can find it for 189 in the UK, which drops to 175 with the code SHP5Q3.
Sure, youre getting a smaller 5.2 IPS LCD instead of the 5.5 AMOLED screen of the new model and no dual camera either. But a sub-200 price is still pretty solid for a phone with a 16MP camera with OIS, 2160p video capture and Android 7.0 Nougat. The 2,600mAh battery seems fairly small, but the Snapdragon 625 chipset will make the best of it.
Check out eGlobalCentral for the deal. The Zenfone 3 ZE520KL typically goes for around 280 in Europe.