Right, Chris, my 5 pennorth.
Rods. A downtide rod is one that you stream over the back of the boat with the tide, i.e., you allow the tide to take your terminal gear away from the boat.
An uptide rod is one used to do the opposite; you cast it uptide of the boat and obviously use a gripper weight as, without these, it would eventually become 'downtide'.
A downrigger is a piece of kit to get your bait/lure to a determined depth. It is a short rod attached to the boat with a wire line on a large 'reel' with a depth counter. The lure is cast away from the boat and the line in front of the rod tip is then attached to a clip on the end of the downrigger line which has a large weight attached. It is then lowered to the desired depth where one can troll the lure/drift the bait at that depth where you hope the fish will be. when a fish strikes, the line detaches from the clip and the fish is then played in the usual way but without the hindrance of weights, etc.
Choice of rods is not something I'm prepared to get involved in as everyone has their own favourites. However, I'm sure you will get plenty of advise from those more brave than myself. Over to you, Tom!
Terry.