I have a Logitech G15 and a Razer Tarantula and I'm currently using the Tarantula. I like the "feel" of the keys a bit more on the Razer and the hot key placement is better for me personally.
The G15 is still a really nice keyboard, and the LCD is nice, however I usually only used the LCD for the date/time when playing games as other then that it wasn't very useful.
Major downside of the Tarantula is the price, but the Black with blue led's really matched my system well so I spent the money and so far I haven't really regretted it

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