If you favour hopping up and grinding on the right-hand side of yer bike then go LHD. Either pick up a LHD rear hub or grab a G-Sport Ratchet (which you can swap the pawls round to go LHD or RHD). No need for new crank arms/running your existing crank LHD as well if you buy yourself a spline drive sprocket.
Also get a hub guard for the rear that fits your hub - or grab some G-Sport glands which attach to your spokes.