which saitex did you have? i have the second version after hearing good things, im constantly having to retype everything because it doesnt pick up all the keypresses, especially the 'T' and 'N' keys!
i like the wireless MS multimedia keyboards, very easy to work on, dont think any have lights though
I'd recomend the Razer Lycosa - especially if you don't want a really wide keyboard. - It was the narrowest lit gaming keyboard I could find about 4 months ago.