Raymo is bang on here on Plossl,s and SCT,s these 2 work very well together as given the long 2000mm focal length you don't need to drop into the. <8mm range for high power planetary viewing, a 15mm is fine.
Also plossl,s give great views when the atmosphere steady,s like any other , perhaps except the good old Orthoscopic .
I know this as I use TV Radian,s for my higher powers but find plossl,s to be as good in my C9.25 .
I would stick with the eyepiece the scope came with and perhaps invest in a GSO 2x Barlow for high power
Brian.