If you write 50GB of data a day to an SSD it should last 10 years. I have had m old 120GB Vertex 2 for over two years now with no problems.
Wait until you can get a 128GB drive. They go on sale regularly and you should be able to find one cheap. Unless you only plan on putting the OS and some programs on the SSD 64GB is too small in my opinion. In fact the only reason I am about to upgrade myself is I need more space.