From my experience, and I have nowhere near that of others on this forum, Steve’s suggestion of maybe 1 more plossl is a good one going by what you already have.
Meaning no disrespect at all to others but I’m not sure why some have suggested eyepieces worth 100’s of dollars when your OP said “budget is always a consideration”.
Don’t be put off by reading about flaws in eyepieces showing in fast scopes. It’s not going to ruin the view when starting out. I had a 10” f4.8 dob for 10 years and barely noticed the flaws experienced people talk about. But that’s just me.
