I'd be using this rod for smaller spinners, chatter baits, and cranks. I have the 705cb glass and love it, but can't throw the lighter stuff all the best with it. I'd appreciate any input from someone who has fished both. Thanks.

I to also have the 705cb , it is a fantastic rod but not for what it sounds like you are wanting to use it for . my 705cb is for square bills and medium depth  crankbaits , spinnerbaits and heavier jerk baits  . I have ordered my 704cb for the same reasons you are looking for lighter lures . The 704 cb is perfect for smaller jerkbaits , spinners etc . Some other folks might suggest some other rod  options . 

Basically you are asking "glass vs. graphite". Constant retrieve lures are going to give a "jitter" feedback. If you don't want that "jitter" in your hands, go glass. If you don't mind the jitter - go graphite.

Personally, I went with the 684C for Spinners and Chatterbaits. On second thought, I kinda wish I'd went with the 705 glass. It simply takes some of the extreme feel out of it. You don't need extreme sensitivity when throwing a spinnerbait. You'll know all too well when she swims up, grabs it, and takes off with it.

I thought the 705CB glass was best all around rod?  I was thinking of getting one.

 

I'm pretty much going to throw 1/2 oz lipless cranks, shallow cranks 0-10ft, chatters and spinnerbaits (1/2 oz) if I can.  Do you think the 704CB glass is the right one?

Step down another notch for small stuff, check out the 684cb. As far as glass, that's a personal preference. See if someone has one local to try out.

I thought the 705CB glass was best all around rod?  I was thinking of getting one.

 

I'm pretty much going to throw 1/2 oz lipless cranks, shallow cranks 0-10ft, chatters and spinnerbaits (1/2 oz) if I can.  Do you think the 704CB glass is the right one?

you will hate the 704 for those techniques. get the 705. 

I agree with iabass. The 705cb will be better suited for those techniques.

Feeling the vibration from a crankbait can get you significantly more hookups. Some sensitivity is important, this doesn't necessarily rule out glass rods though. For shallow square bills and ripping traps through grass I prefer a graphite Mod-fast action. Med and deep cranks I like a good glass rod. I'm not familiar with the Dobyns specifically so I can't speak to that part of it.