i would also suggest altis. I have 07 now. Previously meron kami exalta mga ganyan modelo din pero not sure kung same engine and platform sa sentra ung exalta.
for altis, things you should look out for:

AC system, common issue sa altis yan magmula 9th gen.
engine oil sludge, prone ung design ng altis, i guess. alaga lang sa oil change dapat
trunk, hindi nakukuha sa isang banat ang pagsara. minor lang naman

everything else is what you would expect sa toyota. quality build, easy/affordable parts, 7-9km/l on city and can go as high as 16km/l sa hiway kung pasensyoso ka.

any questions about altis tanong mo lang I'll help as much as I can.