Slim-ish case

Hello, I will be building a new pc at the end of September and so far i have had my eyes set on the Silverstone RVZ-01. But so far I was only able to find only a 450W SFX PSU (also made from silverstone) and I am not sure if it will be enough. 

I have yet to decide on a CPU or GPU because it seems like in the next weeks there will be some new releases from AMD and Nvidia. I've looked into a few PSU calculators online and it seems as if everything will be fine, but I would feel better if i had some overhead in the Wattage area.

Not that it matters you can assume that the pc will be based on 4690k+780.

What i am looking for is a case that can fit in my suitcase, I am a student in the UK and I want to fit it without taking out anything(apart from the Graphics card). If you have some case in mind around 70GBP please leave a comment.

 

Silverstone also makes a 600w version of the same PSU, called the SX600-G.  It seems to be out of stock almost everywhere, but I found one on ebay with international shipping, if that helps.

awesome, that will probably be my choice unless a i do find a slim case to cut costs. Thanks mate

Edit: Actually there is a problem. i will kinda need it to come with other parts so ebay wont do it...the hunt is on again