We went through the "what to buy" for a long time, simba is seriously well made stuff, not cheap new or secondhand, Cousins is well made too and not as expensive.
If you want to do a bit more tilling than your roller, you need cultivating tines and levelling paddles.
We were going for that option, either a unipress or cultipress was our choices initially.
In the end we went for a carrier, as we need a bit more cultivation and we got that with the discs, it was a very expensive machine, it does great work, can't fault the machine.
Built quality is excellent.