It could be that the boots and bindings you have on the GNU are too soft for it.
Edit: that said, i think your Lofi rocker is exactly the board you're describing/looking for. A friend of mine has it (size 152cm) and she loves it. My wife has ridden it a few times too and really likes it as well. They have both improved a lot on that board. Very versatile... as far as quality goes hmmm i'd say so-so, it dings easily. But it has a really good price.
Last edited by F1EA; 04-08-2014 at 05:16 PM.