Shimano Telora 8" medium action downrigger rods. It's hard to beat them. I had the Okuma Pro GLT rods before and was completely against buying expensive rods. They're just too many ways to break them on a boat but after using the Teloras I was hooked. Teloras are much more responsive and have a better backbone when you need to dig in for a big fish. Definitely worth the money. I still have the Okumas but use them for walleye now.
I use the 9' Telora roller rods for dipsey I think they have the lightest action out of all the Telora roller rods.
For copper I use the Okuma GLT Copper 8'6" rods. I couldn't be happier with them. I bought a Telora copper rod to try out this year but I don't think it will make much of a difference