Likewise, I've bought 2 Cressi consoles with computers from Amazon for my kids, albeit a few years back :
July 2019 Giotto + SPG £101 new
June 2019 Leonardo + SPG + Compass £100 Amazon Warehouse
When searching Amazon, the search facility is bizarre - so try a few alternatives such as console instead of computer. You may be amazed at what turns up! And worth sticking stuff in your basket as Amazon will show you price changes. Recently bought a Cressi torch for £44 - next day it had gone up to £70.
Slight word of warning - there are other threads on SB detailing a problem with the Leonardo failing to boot up. Otherwise a decent, simple, computer.
SEAC seem to have had an issue with their computers dying - water ingress.
On the whole, I'd initially stick with a wrist mounted, simple computer. And a single console with SPG - I don't really understand why you want a depth gauge as well, nowadays. Probably "backup" - but it's really backup of backup - your dive buddy is your main backup. OK, I'm an old & cynical diver, but there seems to be a quasi cult nowadays of more & more kit - which suits the manufacturers......
Keep it simple, enjoy the diving (which is what it's supposed to be about....), get to know & understand your kit, learn from talking to a wide variety of other divers & go from there.