Much depends upon how deep the water is and how much sinker weight is needed to hold bottom where you fish.
I use 2 rods for blackfishing. For blacks under 8#'s I use a lighter rod and a heavier rod for bigger fish. Some day I hope to have a 10#er on the lighter rod just to see if I can get a big black out of its home.
The deepest I fish for sea bass is 80' of water so I use a lighter rod that can handle 6-8 oz of lead.
Here are companies that i feel build good factory rods. Lamiglas, Seeker, Diawa sea Line series and Shakespeare Ugly Sticks.
Check these out at your local tackle shops. Ask their advice and ceiling poke a few rods to find one that feels good to you.