If you are still not convinced that an SSD upgrade is really beneficial in terms of overall performance like I am already, here is another comparison. I have upgraded an old but still sexy Thinkpad X40 with an SSD and the result is awesome. Also just recently I replaced the boot HDD on my Windows XP Desktop with an SSD and the resulting performance gains are dramatic.

iGadgetLive compared the overall performance of an Acer Aspire One D250 netbook between HDD and SSD.
Quote: "My Acer Aspire One D250 came with a standard mechanical hard drive, and recently I acquired another SSD drive so I figured why not swap the HDD out for the SSD as that seems the popular way to go these days. Now I knew the read and write speeds of the SSD would be much faster than the lowly 5400RPM hard drive, but I was curious as to how much of an actual affect it had on the system as a whole though. I wanted to know just how much an SSD affects everything in the system and not just the transfer rates or read/writes. So of course I took the time to run a whole lot of tests, not only comparing the SSD to the HDD but I ran system wide tests as well to see where anything might be different, or if anything had improved elsewhere besides just the reads and writes. So read on t find out what I did…"
Read the full comparison on iGadgetLife. Shop for SSD on NewEgg.