Help! I need advice. I bought a Burton board with the channel system and was looking at the Lexa EST Bindings but felt when trying them on that the back plate (on achilles tendon) seemed very flat, but these were the only ones matching the board, colorwise. I'm a girl. So there's that...

I already have a general "help me choose bindings/board" thread here http://www.snowboardingforum.com/bindings/68258-upgrading-gear-after-10-years-stiff.html but wanted to ask specifically about Burton Channel (ICS) adapter plates for my old (circa 2001) Drake F-60 Bindings. I can't seem to...