Congrats on your pending wr250r!
$5 of gas will take you for hours of trail riding. I think an aftermarket tank's capacity is more for adventure or desert rides. However, the Safari tank does offer tremendous radiator protection, so may be worth having for that reason alone. Provided you don't fill it full, it carries the fuel a bit lower than stock too.
Bark busters have saved me from a lot of damage, skid plate has some nasty dents on it too, so probably a good thing I have it. Some people here can make these bikes go anywhere a KTM can. Sadly I'm shaking off perpetual rust, so often happy to make it home alive with bike more or less intact. Adam