If you can really do short radius dynamic turns, going with a more advanced board shouldn't be a big issue. Otherwise, you may find turning pretty challenging, particularly making tight turns, when it's steeper. You should be prepared for the new board to be less responsive to foot/torsional steering - which can be compensated for with good dynamic riding.
IME, the board can make a huge difference in edge hold, but if you can't turn it, that doesn't help you.
If you really are doing dynamic skidded turns (especially if you can do them on blacks), I wouldn't call you a beginner. If you are using pivot turns/windshield wiper technique, you should probably work on 'real' dynamic skidded turns first (easier to learn with your floppy board).
But if money is not an issue, you always have your old board to fall back on. Or you can try to find a rental shop with decent equipment and try a few different things...