Plenty of us running S30 on this size machine with no issues. I don't know why in Scandinavia its seen as a bit of a no no but from what I've seen, they don't run many under 3 ton machines, and due to better access around houses, and being able to tow with their bigger wheeled excavators, they don't run 2.7 tonners like we do to try and mitigate the towing laws.
Steelwrist seem to be the only company holding out on the S40 over 2.5t rule and I have no idea why, as
@APhillips says, their S30 unit is plenty strong enough.
Rototilts R1 is a brilliant unit, and regardless of the hitch its running, is more than capable of being under an EZ26. In S40 guise, its rated well beyond that! Same unit, just different hitch size - it doesn't make it any stronger in places like the slew gear for example.
Engcon warranty the EC02 up to 3t now. I've run one for coming up 10 years now on a JCB 8026 and never broken a unit. Sure, I've broken the hitch ram a few times, also had a cracked bucket pin. The hitch has been improved recently so shouldn't have the issue again, and the bucket pin seems to have been a one off - I've not heard of anyone else breaking one. Either way, all issues were fixed under warranty.
I've done many videos on the subject and made my feelings clear in other threads but to summarise for the OP, weight is crucial in this weight class. The lighter the tiltrotator the better for the day to day use. We also have to think about trailer weights when towing it, and it all adds up. Keeping under 3.5t with the machine, tiltrotator and trailer is hard work! Let alone attachments.
All the brands are decent, find the best deal for you, with the spec you want. I run an Engcon because its the lightest unit and I need that to offset the heavy machine I have.
Also, pick the right buckets - they are crucial in getting the setup right. Sure the Engcon/ Steelwrist buckets are expensive but they will last you multiple machines and there's no doubt they have got the weight and geometry right with them. Don't settle for cheaper buckets trying to save a few ££'s, honestly its not worth it in the long run.
@doobin will back me up with this I'm sure.
Weigh your current hitch (which it sounds like you've done) and your buckets, then add some bags of cement to the bucket to get a feel for what the tiltrotator will be like on your machine. Its a cheap way of seeing what the weight will feel like.
Oh, and go for a top hitch. If you break the tiltrotator for any reason - be that accidently catching a hose, or an unlucky issue - you can still keep working direct mount. Personally I never take mine off unless I need to use the breaker or Auger, I don't find the reduced breakout force to be an issue - usually you can attack things from another angle rather than having to use all the power. But there is a point to being able to drop it off when you don't need it, or need to lift something heavy, or narrow trenching. These mini's do so much for us that having the option to run with or without the tilty is more useful than it is with the bigger machines if I'm honest.
And the top hitch weighs something like 12kg iirc. Its a non issue.
Good luck tilty hunting and let us know what you get.