That C8 is a bargain for sure , it'll sit nicely on an eq5 type mount and on that look at Andrews Communication,s website they have the Bresser type for a very good price. , $400? From memory and would make a good setup.
On the eq mounts, yes they are not a problem once you get your head around them .
Your scope is a classic and if you do go bigger it will be well worth doing up and while you are at it just drill 3 new holes about 30-40mm above the original ( towards the focuser )holes that hold the mirror cell and this will allow you to achieve focus with the adapter you made and your 1 1/4 inch eyepiece,s
Good luck on what you decide.
Brian.