No I had the head unit that is in my pictures installed by an alpine dealer here in Adelaide. Have since swapped out for an IDA-X305 which was just plug an play.
I dropped in some pioneer 2 ways I used to have in my previous VS when I got the car. Can't remember what they were, but dropped straight in and are an obvious improvement over the stock speakers. Keep meaning to get a pair of splits to replace the factory ones as they are just sitting there not connected at the moment, but that would require efffort, lmao.
Have thought about a sub, but I really don't spend enough time in the car to enjoy it. There was a shallow mount clarion sub at one stage intended for small spaces, it was about the size of a thick phone book but never found any reviews of it to warrant finding one.
Oh, and my aftermarket lid which is nearing 5 years old now is starting to lift on the clear coat, time for a rub back and re-clear I think