I need to change my case but am wary, so need advice :)

[idrisguitar]

like this

http://gryphonit.securewebstore.co.uk/INU_products/INU_ProdDetailsL2.ASP?ref=08092530 does is matter that its a mini tower and not a midi one

and it does say its stanard atx

 

[Ellothar121]

Like that.

Read the specs. Specifically, motherboard compatibility.