Well, us Gen1 users with HDD are very limited by what is out there.
The Mtron 32G SSD had speed but you will have to carry a USD 2.5 inch drive everywhere for your data. music . etc. To go 64GB is a pricey option.
OK, a compromise might be using the Mtron 32g, then carry two Cosair Voyager 32G USD sticks. At least this combo has not moving parts on your data.
I will hold off until the SSD in Gen 2 goes to 256GB in size (and some more speed please ... maybe by Q3-09 ?).