I personally like having a front lit system. It's not perfect, but it's the best option if you need an added light source. I also have a regular system I play on when I don't need the front light because, as someone previously mentioned, the light washes out the display a tiny bit and covers a couple rows of pixels.
ggallegos, I'm fairly certain I have a broken SP with a good light I have kept for modding purposes. You can have it, just PM me and I can mail it or you can pick it up.
Reasons why the other options are bad (other than the fact none of them are easily attainable):
Nyko worm light - this requires its bundled rechargeable battery pack to plug into, and the combination of the two is cumbersome. It also causes glare
Madcow Sun light - dim and has the same LED glare issue
Snap on light magnifiers - In my experience, all brands of these are terribly designed and break super easily. I tried using two different kinds and, fresh out of the box, hinges on both broke immediately; I barely had a chance to try them.