Yaar!
Simply go for a Coolermaster Caviar cabinet with a price tag of 2500-3000/- ! ok?
You can also look out for i-Ball cabinets with the price tags of 1500-4500/- . These cabinets come with already a decent smps, that would be sufficient to juice up ur config and will give you good price ratio too.
but if you are adding a hefty graphics card to it, then i would suggest you to go for atleast 350W SMPS from Antec or Coolermaster.