I have a Inspiron 1525. I would like to replace the existing hard drive with a solid state hard drive. What size do I need (in terms of inches not gigabytes.) I'm thinking something around 80-100GB would be sufficient for me. I will be installing it myself.
The best first stop for solid state is the SSD decoder as perper.com. It has a lot of information about size and speed.
For people who don't know anything about SSD's, Intel is the "standard" for SSD's. Most SSD's are designed to be installed in a laptop. Unless dell did something weird, it should be a 2.5" drive.
If you can enable AHCI on your laptop, I would go for it. Not all laptops support this interface standard so make sure you have that feature before you buy. Also, make sure you are on windows 7 so you can get TRIM support.
Hope this helps