Barath deena

Hello there, am a newbie with regards to astro photography. as a university student am constrained financially but my obsession with astrophotography for over a year has pushed me and I have bought a Canon 700d (which will get a full spectrum mod soon) and SW star adventurer 2i pro. I've played around with it for nearly 2 months now. Am able to to get just under or over 2 minute subs with a 300mm lens after weeks of understanding how to polar align it properly in the southern hemisphere.(I live in Melbourne now). Am looking to buy a telescope that is under 3kg and over 400mm that would fit my budget of max 1000$ inc focal reducer/field flattener but lesser is better. Some of the options under consideration are; SW evostar 72ed (also, does anyone here have experience with evolux ?) Svbony sv48 90mm https://www.ebay.com.au/itm/SVBONY-SV48-Telescope-Astronomy-2-F-5-5-90mm-Refractor-OTA-Double-Speed-Focuser-/273921570267?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l6249&mkrid=705-154756-20017-0 SVBONY SV503 Telescope 80ED F7 Telescope OTA Focal Length 560mm for Exceptional Viewing and Astrophotography https://www.amazon.com.au/dp/B085NTQL2C/ref=cm_sw_r_apan_glt_fabc_YEP7S9BSVZ6W0C6S65PZ Astro tech AT72EDII https://www.astronomics.com/astro-tech-at72edii-refractor-ota-fpl-53-f-6.html Let me know your recommendations. And tips. Cheers.