You might look at http://www.micropirates.fi they have a range of cases and not too expensive, but as t the spec, well you will have to see for yourself. You can certainly get a 350watt PSU case for the money you want to pay though.
When i am planning to buy some pc parts i first look different brands generally to deside which brand and part i am after, then i check on the pricewatch which shops sells it cheapest. Price differences between shops can be really big.
Pricewatch is unfortunately in finnish but if you type 'kotelo' to searchfield you get some listings to start with. List will show lowest prices and clicking them shows which shops sell on that price.