Which micro/mini on road car to get??

[Nito]

Am looking for a micro or mini on road RTR set to get for my personnal amusement but am torn between these 3:

1) Mini Z MA010 AWD
2) Micro RS4
3) Xray M18 (Not sure if available in Singapore?)

Can anyone who have experienced these cars advise which would be a better RTR set to get for pure drifting pleasure?

I am looking at a few factors:

1) Cost
2) Upgradable?
3) Parts availability?
4) Quality?

Hope someone can help......