Hi Shane,
I'll go the opposite approach and say get the aAgonavis and encoders.
I'm pretty sure the encoder kit is now available for the Skywatcher collapsible dob.
For things like the moon, Jupiter, Saturn, you probably wont use the Argo to find these as their pretty easy to identify using something like Stellarium. But sooner or later, you'll want to observe/hunt down dso, globular clusters, maybe double stars and thats where the Argo comes to the foray.
Not sure what your patience is like or your preparedness to go into learning the traditional way, but it can take time and could lead to frustration. The Argo on the other hand takes you there (admittedly you need to push the scope to get to the objects) but the hard work is done for you, leaving time for you to enjoy the objects and understand/learn from a different perspective.
I know there are diehards out their who enjoy learning the traditional way and there is nothing wrong with that, but the Argo imho an invaluable resource. You could wait 6 months before getting the Argo, but when you do, you'll kick yourself and ask why you didn't I get that in the 1st couple of weeks !!!
As for eyepieces wait awhile and appreciate those, but definitely better to have a few high quality ones as opposed to several medicore ones - the difference is amazing and more important for faster scopes < F.5.
Good Luck.
Norm