Boomerang was designed for the sole purpose of running stuff like classic Looney Tunes, old Jonny Quest and other classic HB cartoons, etc...I'm pretty pleased with the way CN and Boomerang have handled Looney Tunes. And if I wasn't, I'd just pop in my Golden Collections Vol. 1&2.
I think CN has made cartoons far more accessible thatn they were in the 80's & 90's. I've never been able to get cartoons on demand the way I can now with 2 full networks devoted to them.