IMO;

Saga - if its truly fuel efficient, it would've gotten an EEV certification. It didn't soo......also Saga + ESC still 4 Star Asean NCAP, and you're not getting much for your money (No touch screen, no push to start, no multi info display etc)

Iriz - If can get a lot of discount, why not? It's very cheap, and be sure to get MT. Their CVT is crap. Their MT is excellent. Even the Standard has ESC. BUT, it has been known to have dashboard rattling

MyVi - too old, Bezza much more value for money

Bezza - Even without ESC still 4 star. But get the full spec Advance. 5 Star. ESC. EEV. Push to Start. Auto Start/Stop. Touch Screen HU. Miles better in equipment and safety compared to Saga/Iriz/MyVi; but hodoh abit from the back.

If I were you, I'll just go for the Bezza Advance. But if no budget for the Adv, the X also okay; still better then Saga in terms of specs (since got Push to Start, and roughly equal safety grade)

TL;DR:

Saga - No
Iriz - Maybe (Price advantage)
MyVi - No
Bezza - Yes

*Also, based on experience of owning Preve and MyVi;
Perodua - Cheaper service, less time in SC
Proton - stupid QC, expensive service