Here's the order I'd rate for my personal use.
For offshore cruising, Transas. It's used by shippers and commercial vessels heavily and also by many of the ports along the way. Overkill for coastal cruising so on to the rest.
Furuno. We are huge Furuno fans with no problems. We also have Maxsea using Furuno equipment for everything else. Maxsea is very simple and straightforward. We use Furuno as a backup even when not as our primary. Can't say enough positive about it. And for those just looking for charting, don't overlook Maxsea. Integrated out of the box with Furuno.
Garmin. Didn't think we'd like it. On coastal cruising would still choose Furuno, but on inland waterways the Garmin charts are superior to anything else we've seen. Have had no problems with Garmin. The obsolescence issues don't really bother me as I expect that. On the boat we have Garmin, we have everything from their radar to autopilot to sonar.
Raymarine. I used Raymarine first in school while I was using Furuno on our boat. Never liked the Raymarine as well, but that may just have been comfort level. However, used Raymarine on testing Sea Ray L Series boats and it was ok, still didn't thrill me. But my number one reservation on Raymarine was a lot of systems delivered with problems on Sea Ray L Series. Many had to have components replaced. They shipped before it was tested adequately and ready. Of course I blame this on Sea Ray too in installing brand new offerings. Raymarine did respond with quick changes and sending new equipment right out.
Simrad. Have used Simrad autopilots but never their systems otherwise. The choices we had on the Sunseeker were Garmin, Raymarine and Simrad, as those are the three the factory installs. I liked the functionality of Simrad and they were pushing it heavily. We tested one boat with it. However, the more I researched, more people I talked to, the more concerned I got about their customer service. After having been spoiled by years of Furuno and Transas, I would find what many have encountered intolerable. So, no.
On a one to five scale:
Transas for offshore 5, for coastal, overkill 3
Furuno 5
Maxsea with Furuno 5
Garmin 4 but for inland 5
Raymarine 3
Simrad 1-If your customer service is poor, then I don't care beyond that.
Now, also understand that while I have a lot of experience, in the universe of equipment, none of us are more than a blip of experience. Just anecdotal. And, no real concrete evidence of how the universe of boaters feel. I rate Raymarine mediocre, yet due to relationships with builders like Sea Ray, they have a tremendous number of happy users.