probably the reason why the previous owner changed to smaller rims was for the comfort

smaller rims = thicker, higher profile tyres...
this helps to soak up the bumps on the road

now, if u dont mind a bumpier ride, more expensive tyres and easier to bend rims, u could try going back to 14"
if i were you, i'd stick with the 13", hehe
bigger rims + thinner, lower profile tyres help with cornering.. but i doubt ur turning your kenari into a track car, rite? cheers

the first gen kenari came with 13" rims wat. and ive seen a kenari aero the feller changed the 14" for 13" wira sport rims with dunno what size tyres... and that particular car looks damn good weiiii.....so different from the others.

anyway...pros n cons of 13" rims.

pros
-lighter (depending on what brand ur comparing it with)
-better pickup
-cheaper tyres
-better fuel consumption
-thicker tyre profile meaning the tyre will absorb more bumps from the road hence better comfort and itll help reduce impact to ur rims.

cons
-its small
-doesnt look as good as bigger rims.

my opinion. stick with the 13" if ur just gonna use the car for daily driving.

but if u wanna change rims for looks..15" will look waaaay better than 13" or 14". but u kinda have to sacrifice the things in the "pro" of the 13". best compromise would be 14" of course. but still sacrifice the "pro"...just not as much.

as for rim recommendations.. the best bang for buck would be taiwan made rims which are usually replicas of jap rims. 15" taiwan rims can be had for around 1k brand new without tyres. 14" taiwan rims oso have...but dunno the price. stay away from JRD and BSA if ur looking for rims. soft and heavy as hell.

where to get them?? dunno ur location how to tell u? but assuming ur in klang valey area... sunway and klang would be the best place.