no offense peeps, but i too can't understand why'd anyone want unnaturally colored gravel and stuff.
the list of colors i've seen so far are yellow, darkgreen, brightgreen, darkblue, brightblue, red, pink, maroon, brightpurple, darkpurple.................black and white rocks are nice though. hehe.
but as for me, i'll still to the grey, brown, white gravel mixture. looks more natural.
as for the plastic plants, it's nice that you don't have to take care of them and maintain them. more expensive that live ones but in the long run it's cheaper.