How much is that CM Silent Pro 850? There are better options out there and that has a reputation as being overpriced. CORSAIR 850HX at the same price would be a better option.
What price is the 40GB SSD? How much for the 60GB SSD?
Sure, that price difference it's a major issue.
You'll have to keep an eye on the 40GB SSD to make sure it doesn't fill up too fast.
Win7 install can be tweaked to about 12GB, down from the standard 20GB install size.