Daniel,
The choice comes down to two things: Budget and degree of interest.
The starting point would be a white solar filter - Baader Solar film. Relatively cheap and very capable of giving good views and images in white light. No other filters required.
The next step, to give a small marginal improvement - around 10-15%, would be to use a Herschel wedge. No other front filters required. A couple of hundred $$$
A mono camera gives best results. I've standardised on the ASI 1600MM.
Moving from the white light into H alpha (or CaK) is very expensive!!
The Quark can give good H alpha results and with your 130mm aperture a good UV-IR is recommended as a minimum; many users use a narrow band 35nm H alpha filter.
You don't need a front energy rejection filter (ERF)
Going to a dedicated solar H alpha scope - 60mm Coronado or Lunt is a major commitment and expense. A couple of thousand $$$$$
As a viable alternative to the above, the Mini Spectroheliograph is worth looking at. Much much cheaper and much more versatile allowing safe imaging at all wavelengths - CaK and H, Mg and H alpha and beta etc.
See the Sol'Ex webpages for an introduction.
http://www.astrosurf.com/solex/sol-e...tation-en.html
You can find some examples of the SHG results here:
https://groups.io/g/Solex-English/messages
If you need any further info on the SHG let me know.
