I've been reading quite a bit from everyone here with regards to their radiator problems and finding the whole rationale for replacement and service a bit arbitrary.

Often the solutions employed by people are constrained by cost. But I do wonder when the discussion about rational value starts considering the price of convenience and peace of mind.

The reason why I'm asking these questions is that I suspect a lot of people decide not necessarily out of which is cheapest or easier, but because of habits. Which may or many not necessarily be a good thing. But I think it would be helpful to find out.

These are the typical scenarios for a typical 8-10 year old car in replacing a radiator (it may be applicable for other parts as well):

A) Replacement Aluminum Radiator from China P4500 with no warranty.
B) OEM Aluminum replacement radiator P13000 with 6 months warranty.
C) Local aftermarket Copper Brass replacement radiator P8500 with 6 months warranty.
D) Local aftermarket Copper Brass replacement radiator P6500 with no warranty.
E) Surplus radiator "covertion" P2500 with service warranty.
F) Premium aftermarket replacement radiator P13,000 with 1 year warranty.

So the question is, what do folks here consider more important?