How are your day time seeing conditions at the time(s) of day you can potentially image?
Knowing nothing else, I would argue for a Lunt option over virtually anything else at the entry budget stage and when purchasing new. I would avoid any Solarmax II or III options (basically no support and the etalons are probably the lowest quality overall). I would actually avoid any Daystar option too, unless you for sure know you have seeing conditions that would support the image scales you'll be forced into, and the idea of knowing the electric components to heat the unit(s) to be on band, waiting time, overall total gamble of entry level Quark etalon quality and uniformity, etc. Beyond these, Solar Scope & Solar Spectrum make good options, but they're pricey. Again this is if you're buying new. If buying used, well, it depends on price and if you can test and see the equipment first and preferably actually on the sun to ensure you're getting something good and not just a crippled system that you'll regret with awful uniformity or something worse.
Check out Lunt's modular series of pressure tuned HA scopes; they're not dedicated, they're modular. Great support. Good etalons.