I had a look at the Blaupunkt when I was searching for a replacement for my Aero. There a couple in that range/style.
It looked way better than the Alpine.
It had all the key bits, bluetooth to iPhone, DAB+ and it looked smart against the black finish turned dash in mine.
It had a couple of limitations.
4 way speaker outputs but the internal amp was quite weak if you like to hear when driving
Only 2 way pre-AMP level outputs (not high power pre-output so you need an amp with good input gain)
You could use the internal amp for the fronts and the pre-out to power an additional amp for the rear IIRC but do check if this is what you are after.
The smaller 4x6 in the front of the Aero door cards cannot take too much power, if you have the door cards off they are worth uprating.
The speaker cable is also worth replacing however getting anything through the door pillar bundles without risk of long term abrasion is difficult.
I have the Becker Indianapolis in the S2 and it looks more integrated so perhaps don't fixate on a Unicorn and consider a different Becker ? Just an idea?
https://www.ebay.co.uk/itm/265720728979? It has a good 4 way built in amp as well.
