howie's setup shudnt take long time since your are entry level ICE setup with minimal tuning required.

but my experience of installing (not howie) took around 2hrs for component set + amp to my stock HU which is ok coz satria neo door panel and HU is a hassle to disassemble.

well... demand for cheaper ones from the masses and frankly, i seldom see real ICE players will go to kedai abang.

big shop doesnt mean they cant sell replicas. but to be frank, can you tell the differences between the original and the replica if you dont have that question in your mind?

which is why you want recommendation and post a topic here
try to be aware of the thing u want to buy. if you want a piece of mind, go for authorized dealers only. if that dealer also sell to you replicas, at least you have the proof.