As to what is "best to get later"- that is a very open question.
You are best to use what you have got, maybe turn up to a few starparties and look through others scopes (with their permission of course) before embarking on a acquisition spree.
Try to avoid the "gear acquisition syndrome" and enjoy what you have for a while. When you feel you have reached your limitations, then you can look for soemthing better.
Granted, often we don't know what we are missing out on. My first look through a Televue Plossl ocular was a total revelation. I just didn't know that anything could be that good. In my opinion they are amateur astronomy's biggest secret. However, that was many years ago, and I am sure that there are many Plossl design eyepieces on the market that are very good.
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