Sorry, I live in Canada. Check Tom's ssd buying guide for ideas. I read an article about when, or if, an ssd would help a system. I think your g33 / duo was right around that line. An older rig would NOT see improvement. Your rig may show a minor improvement.
With that in mind I would look at a 'good' second gen drive such as intel 25m or vertex 2. Basically looking at price/gb but also looking forward to using this boot disc with your next mobo too.
Being that you're happy and comfortable keeping an eye on your boot partition you can get away with a 60 or 64 gb drive.
Here's the link:http://www.tomshardware.co.uk/ssd-nand-reliability,review-32297.html