If you can wait, I would wait for the next string of SSDs to come out as it doesn't seem it will be too long before that happens, and you can pick up better price or better performance.
Now on this, I could be totally wrong, but I believe using that drive I just linked with Windows 64 bit, you shouldn't see much if any of a drop of as the SSD fills up. If you were using a different OS you might have to get an "enterprise" version of the SSD (I believe the 50gb version of that same drive) which has a built in method of deterring that exact problem. Some one with more knowledge than me would probably have a better handle on this part of your post.
Is the rule with ssd and hdd the same with the more space you take up on the device the slower it would be?
HDDs perform gradually slower as you move closer to the end of the drive (centre of the platter) because less area is covered by the drive head per rotation than around the outside. SSDs don't really slow down until you reach the end, where the difference can be quite dramatic. A drive filled to the max with mostly static data that is never deleted or overwritten will also suffer excessive wear in certain areas of the NAND. An SSD with more overprovisioned NAND (all SSDs have more space available than is visible to the OS to spread wear around) will be less affected by both problems than a drive with less. Really small drives (40GB and less) are particularly susceptible as they often have 3GB or less of overprovisioned NAND.
Ok thanks a lot to both people who voiced their opinions and facts .
I will wait for the next round of ssds to come out hopefully the about mentioned ssds 60gb sandforce hit about $100 even so I can swipe one.
How long will the average ssd last if I install windows 7 + 1 game and never add/remove anything?