A good finder is very nice to have for context, but a top-of-the-line finder with goto is definitely a luxury. If we're talking limited budget, probably the one area you can skimp on. As others have mentioned, a Telrad could do in your dark skies. Alternatively, if you still have the 127, the finder from that could go on the C9.25, provided it has a $14 Vixen/Synta finder dovetail. These are easy to find online if you don't have a dovetail shoe already installed on the telescope.
If a right angle is necessary, this price cannot be beat:
-This will still require a dovetail shoe.
This allows you to use 1.25" eyepieces in a 2" diagonal:
You are in luck with your requirement for lunar and planetary views! You can find decent eyepieces well within your budget. I have a couple X-Cel eyepieces from Celestron that fit the bill in terms of price and quality. They aren't premium eyepieces, to be sure, but they are certainly good enough to get you started. I really like mine. I also use both the 2x and 3x X-Cel line barlows. Here is a discussion about them on Cloudy Nights:
Astronomics also sells the Paradigm eyepiece range here:
I've not used Paradigm eyepieces, so I cannot speak to them. I've not read a lot about them (good, bad, or ugly), which I find to be a good thing. There is an older review of them here:
There are other eyepieces in the $60-$80 (each) range that can also provide quality, mid-to-high-power views for planets and the moon. Others likely will chime in with their favorites or what works for them. You have some choices here.
As a Cloudynights member, you get a 10% discount on purchases. That can start to add up.
Planetary imaging is certainly a possibility with your mount and telescope. Deep sky imaging (galaxies, nebula, etc.) that require long exposures and very good tracking will likely be difficult given the focal length of your telescope (2,350 mm). Even with a focal (length) reducer, I think you might find deep sky imaging to be an exercise in frustration. If you want to image the moon and planets, your mount and telescope are an excellent combination. I use the updated version of the CG-5, the AVX, and the combination is excellent for planetary imaging. While a much more expensive, higher-capacity mount would be nice even for planetary, it certainly isn't a necessity and will not noticeably affect your planetary or lunar imaging results.
Edited by gfstallin, 19 October 2019 - 10:49 AM.