Price's are going to come down again this year as 25nm flash memory is being produced. Tech sites are expecting the price to reach around $1.50-$1.60 per/gb sometime this year, and that is when I will most definitely be going with SSD's.
Make 100% sure you research before you buy an SSD, or you may get worse performance than your old hard drive. Sites like anandtech do a very good job of explaining which SSD's are actually decent, so be sure to read up on them.
Many tech sites proclaim that an SSD is the single greatest improvement in performance you can give your computer in terms of making everything happen instantly in windows.
Solid State Drive idk what that has to do with cans, but these things are the future of hard drive memory. Normal hard drives use mechanical parts, as where SSDs are purely electrical. They look like a metal slab. They are much faster than normal hard drives, but INSANELY expensive.
My old computer had a 2TB hard drive and cost me $160.
I have one as the C drive in my Puget Systems desktop, and I feel like I could never go back to a regular one. The "whirrrr" is gone, and so is a lot of fan noise and heat.
I have an external one too, and it's the same advantage. Get them if you can by any means afford it.