All of those upgrades are absolutely doable. Given the price of those upgrades, all-in, a Voron will be a better value. Unless you have most of the parts already, anyway.
Although, I wouldn’t bother changing out the board unless you have specific needs. Firmware and config tweaks will take care of most issues I’ve seen with it.
The fan is probably on par with stock ender 3. But always-on.
Maybe.
I’ve built a Voron 2.4 350, and own an SV08. I’m currently working on a detailed teardown/analysis/reverse-engineering of the SV08.
From a user perspective, there haven’t been any deal-breakers so far, but certainly some annoyances. In short:
That being said, there are also many nice touches and good attention to detail in other areas. Overall, I’m satisfied with my purchase, but don’t buy it to upgrade (aside from the mainboard fan). There be dragons.
If a Voron 2.4 fits in your budget, get a Voron 2.4. if not, the SV08 is a good choice if you can live with those annoyances, and especially if you are comfortable with third-party firmware mods (whenever they come out).
As an aside: based on my analysis of the mainboard, I strongly suspect Sovol is working on an MMU for the SV08.
I have the LDO Rev. C kit, and it is rock-solid. They’re releasing the Rev. D kit soon, and I can only imagine that’ll be even more refined. I printed my own parts using a combination of Phaetus aeWorthy ABS-GF and 3DXTech ABS-CF.
If your printed parts are good-quality, you follow the directions precisely, and stick to the kit (no mods beyond the LDO-provided ones), I see no reason it shouldn’t provide years of trouble-free service.