Mine is the Logitech G15, and yes, the not_having_that_bloody_'double'_delete_key was a factor, as were the not-rearranged home/end/pgup/pgdn keys and the presence of the insert key in its normal position.
I frequently use shift+insert to paste (especially in places where CTRL+V fails) and will not put up with a keyboard where it was removed.
And don't even get me started on the 3-by-3 arranging of F-keys that I've seen on some recent keyboards.
I like my keyboard as it is. The one key I absolutely never ever use is that windows/menu key on the right (next to right-CTRL), but it doesn't bother me enough to even ponder its removal.
If the keyboard manufacturers want to add value to the keyboard, they can feel free to add multimedia buttons at the top, which I can use or ignore. (Preferably they'd agree on an industry-wide standard for them and then use that on all keyboards, so I don't have to relearn the buttons every time.)