Don't go for GPON, if you have a chance. Direct cabinet-to-apartment single-mode fiber (can be a pair that gets BiDi optics if one of the fibers fails, though only worth it if correlated failures aren't the bulk of issues) is future-proof. Also GPON tends to not get anywhere near the awesome pings 1G-LR and 10G-LR provide in sub-lightpseed regional situations.