If you're considering a drive upgrade, you should seriously consider the Seagate Momentus XT
http://www.anandtech.com/show/3734/seagates-momentus-xt-review-finally-a-good-hybrid-hdd
This is a regular mechanical hard drive, with 4GB os super-fast SSD drive integrated in the same box. It's not as fast as a 100% SSD drive - but it's a lot faster than a regular mechanical drive, and not much more money. It's also plenty large enough (500GB) - while you may find an affordable SSD to be too small.
If I were buying a laptop, I'd fit one of these as my first choice, as it seems like an excellent compromise between speed/cost and space.
http://www.anandtech.com/show/3734/seagates-momentus-xt-review-finally-a-good-hybrid-hdd
This is a regular mechanical hard drive, with 4GB os super-fast SSD drive integrated in the same box. It's not as fast as a 100% SSD drive - but it's a lot faster than a regular mechanical drive, and not much more money. It's also plenty large enough (500GB) - while you may find an affordable SSD to be too small.
If I were buying a laptop, I'd fit one of these as my first choice, as it seems like an excellent compromise between speed/cost and space.