The advantage of SCTs is their compact package long focal length. Even a 8" Edge HD will give you 2000mm of focal length with nothing added. Stick a 2x Barlow on and your at 4000mm, which many consider a good focal length for planets. Planetary imaging can be done without a flat field (assuming your using high frame rate video stacking and your mount can track reasonably well), so a stock 8" SCT can do the job.
Other than SCTs you could consider long focal length achromat refractor. Any f12-f15 refractor with a 2.5x Barlow can get you good views, images, of the planet's with minimal CA. Have a look at the Bresser f13 achromat sold by Teleskop Express in Germany.
https://www.teleskop-express.de/shop...-Assembly.html