Hi Craig,
I'd say Check out the Meade set before you pass up on them. Won't make any difference to the second hand price regardless and they'll give you a range to choose from, you always need more than one. EP's are always a personal choice so if you can try some out at Star Parties etc before lashing out huge $$$
The movement around Jupiter is usually air turbulence in the seeing. Makes the edges 'boil' and blurs details unfortunately. More prevalent in city\suburban unvirons but weather conditions etc all have a lot to do with it at both local and high altitude. My view lately is back over the CBD so tends to be somewhat messy.
Jupiter is quite bright. I have been using a blue and a yellow filter to help contrast and reduce glare. A neutral density filter might also help, like a moon filter although I haven't tried that option yet. (Mental note to self - must try that )
Cheers
Brent
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