Wow, sorry, its just my opinion. Personally I don't like plastic cases, never have done never will, it will never have the strength, durability, looks, workability or mod-a-bility of ally or steel.
but seriously the phantom was plastic and steel as well and it was the most flimsy piece of crap i have ever used so im staying away from nzxt products for now
his budget is £200 oh i didnt see the budget bit go either corsair 800d or 600t or 650 or coolmaster half x these are excellent cases but at the end of the day its what you want and what youl be confortable with .