i have seen the 10mm which comes with those scopes & it isnt great [the 25 is very usbale], a GSO plossl will be much beter, below 15mm in plossl config the viewing becomes uncomfortable as the eye relief is tight & you need to get your eyeball very close to the eye lens.
for solar system targets you should be able to support a 5mm eyepiece, giving 130x magnification. for your scope the BST explorer eyepieces are good quality, they are not to televue standards - but are close to 90% of the edge views of something like a radian. they can be had from
telescopes-astronomy
which conveniently for you is located in SA, they are around the $80 mark. if you want to check reviews google AT paradigm [in US they are badged diff.]