I don't like having to pay more than I need to for what amounts to a 5% discount (in the form of reward points) which usually is less than the discount you get if you buy from someone other than Sideshow (who generally have Sideshow distro'd products for about 10% off). So I don't really have any reward points.
If you don't have any reward points and you can afford to pay for it now, you'll end up saving around $20-30 (I'm guessing) if you order from bambaland, assuming you're in the US. Much more than that of course if you're anywhere else. I know it sucks to have to pay for pre-orders up front, I hate doing it myself, but in the long run I end up saving more money and I always know about releases long before they're put up for sale, so I can set the money aside just as I would for a normal pre-order.