I know its alot of info but its worth the read, there are some good reviews in there.
I don’t know what the Rubber Queen is like but some people rave about it! Its only like 800grams! It was measured to be about 2.8inchs! Even a tyre that wieghs something like 1300 grams will be a improvement I think Boffy, still look at decent volume. Mybe a Maxxis High roller- Something like 2.5-2.7 would be good, not as light as the Rubber Queen but still much lighter! If you get a high roller look for the softer compound I think as thats the grippest (but it will wear a bit quicker). Also you want two ply side walls or bigger I think.