A good start before considering purchace of another scope is Astro Clubs. They all have outings to specific Dark Skys and usually can come with them for a short time before asking to become members.
This is what I did after I purchaced my first scope. Now i am happy with my final decision which will last me a long time. Information from this website is also very informative as well and can assist in your decision.
As far as your scope the main thing to consider is what type of observing or Astro Photography whether you want automated alignment of the viewing area (motorised mounts - Tracking) or don't mind pushing scope to keep up with earth rotation.
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