I have been reading that it is normal for 3-5 year olds to have enlarged tonsils... they get bigger in response to viruses, infection, allergies etc, they act as a filter for all the nasties...then at around age 8 they start to shrink back down...
I dont want to remove something from DS that is there for a reason..
DS was a possibility for removal of tonsils and adenoids if his ear infections kept up. So far, fingers crossed, we've been infection free for 2 months so it won't be needed.

I questioned the value of removing the tonsils much like you have above but was told there was a point that at times leaving them in can be more harm than taking them out. Our DS also has enlarged tonsils and adenoids. Our specialist said it can be more detrimental to development to be constantly getting infections due to enlarged organs rather than removing them. Our issue was ear infections though, rather than sleeping issues.