Well as far as an upgrade that you'll notice a difference and feel like it was worth the money and time, I don't think you'll find a better one than going from a HDD to SDD.
I have a Samsung 840 EVO 500GB. Fantastic upgrade. The included Samsung Magician is a definite bonus, probably the best included software of any SSD. As far as performance wise I think it comes out ahead of the Crucial drive your looking at by a small margin. For the average desktop user, I doubt you'd tell the difference. You would really need to be doing some storage intensive tasks to be able to tell the difference, other than benchmarks that is. Benchmarks are just for measuring e-penes, or verifying that it's working properly, more for the former usually.
Either way you will be satisfied. The first time you boot to your login screen in less than 10 seconds from POSTing you'll get a smile.