Speaking of weighted ropes
I got mine from walmart. It's weighted and has bearings. it's pretty fast and was about 15 bucks. If you're used to using kids ropes and you switch to a fancier one you'll be amazed at how fast they are with little effort.
I recently got a set of crossrope cables. Like you i like working with real weighted jump ropes. They work you out so much harder. I completely agree with you with the price point as well. Not only will a person feel the difference, it will last longer too. Buy cheap, buy twice....or many times!