Pittosporum Hedge - maximum variety height vs. target height

Hello all.  I've been researching Pittosporum Tenuifolium varieties for quite a number of weeks now in efforts at determining which to use for a new urban front garden hedge.  My favourite leaf is on the silver sheen - small leaf and a lovely lighter green green.  My goal is a 1.2-1.5m tall hedge and I've read the silver sheen can grow 4-8m high.  Am I likely to be fighting it forever to keep it short and therefore better off with a variety with a lower maximum height?  My second favourite leaf is the wrinkled blue which has a maximum height of 2-4m.  Less of a battle keeping it pruned to 1.5m you think?  I don't have experience with mature Pittosporum so not sure how much this matters. I guess if the hedge shears are out they're out but given I'm starting afresh want to make the right selection. Thanks!