I have been riding 2018 Honda PCX 150 since new, now clocking more than 40,000 km.

Maintenance can be cheaper than a similar sized kapchai - see here for compilation of 2 years maintenance / 24,000 km.

PCX can do highway but comfortable speed are around 90-100 km/h. It can do up to 113 km/h but the engine is in stressed out working condition thus no longer enjoyable. I sometime do day trip from JB to KL for meal tapau - yes can do.

For your purposes, I would suggest going for used Modenas Elegan 250 (without ABS) that are available for around RM8k. Highway cruising should be more enjoyable.