Want to buy a Driving Force GT..how is it?? any owners.And how much will it be?

Need some help from you guys.
Im thinking to replace my old keyboard with a illuminated one.I came across to many brands,they are all expensive and most of it doesnt seem like my cup of tea especially the Razer Lycosa with such high price tag.
And these 3 little buddies (G105,G110,G510) caught my eye.I dont even know which to choose and will that little LCD would benefit from anything?? I know it displays clock and stuff like that.