im not sure about the spareparts
but people often complain about the bad second hand value of those cars

unless you're those who changes car every 2-3years
i dont see a problem

lets take altis as an example
altis is around 111k, while civic 2.0 is around 120k

elantra is 91k, that makes it around 20k cheaper

if you plan to sell the car after 5 years or so, the difference in the used car value is about the same as the initial difference you pay isnt it