I went for a middle ground as my system is also 24v.
Ordered two 150Ah batteries by sosolar. Gel type. Reviews look good and the R3799 wasn’t on special or anything so yeah.
They do have 100Ah at R2200 each but that’s at the store. On takealot they are R2400 each.
Mine arrive tomorrow, hopefully early so I can have them charged for the 8pm loadshedding scheduled for me. I’m currently in lodshedding and old batteries at 23% and beeping. Don’t care as they are already pap.
From fully charged they managed a measly 160w average draw for 2 hours.
Edit
These 6 year old Ritars didn’t last badly, but now it’s just pathetic. They were at 27v just before loadshedding hit at 8pm