Alright lets get down to it.
If your spinning rod is a 6'6 to 7" medium fast action ( 1/8 to 1/2 or 5/8, then you have the finesse world covered at least well enough. If not, then look at getting one that will. Here arefour rod suggestions each from different price categories
1 Berkley Lightning Shock rod either 6'6 or 7 foot medium This retails for $49 but can often be purchased online for less.
2.Dicks Sporting Goods sells a 6'6" Quantum Escalade rod for $100 but is on sale for $50.
3 Dobyns sells their Fury series rods for $110. Look at a Fury FR 703SF. Powell sells their Inferno 6103 MEF for $99
4 St Croix Avid X 6'8" medium This sells for $200
Since I read what you said about your Mojo Bass baitcasting rod being too light for your spinnerbaits, then I assume it is a more moderate rod like the 6'8 medium model( I am guessing.)
The next rod to complement that rod would be one of these:
1 Dobyns FR 734C 7 foot 3 inches heavy power- fast action rod. It specs 1/4 to 1 ounce, This rod should throw your spinnerbaits, chatterbaits, some topwaters like Zara Spooks, jigs, buzzbaits etc. It again runs $110.
2 Powell Max3D 683CEF. I own the original rod with these specs. It is a super versatile rod. It runs $159
3 Powell Max3D 734CEF This rod is sorta like the swiss army knife it is a great bottom contact rod but works a spinnerbait or even a Zara Spook or small to mid sized swim bait.
Now that would give you a good 3 rod arsenal, that is what to cast with, now on to the lures to cast on each.
Here is why I asked so many questions. See I have to have gear to fish fresh water lakes (big like 60 miles long, small like local ponds and lakes that your boat and a trolling motor can cover, and then large tidal rivers like those on the Chesapeake Bay. These include the Susquehanna River, and The Susquehanna Flats, Middle River and the Potomac River. All of these are so different. You are concentration mostly on small to mid sized lakes,so your tackle choices can be more basic.
On my spinning I would fish lures like the small topwaters, Mepps Spinners, 4 inch Rapala floating/diving minnow baits in silver with black back, silver with blue back back, gold and black. Own some 1/4,1/2,and 3/4 ounce rattle trap baits, Bill Lewis Rattle Traps are good but so are the Red Eye Shads. Go learn about the Z Man TRD Ned riggs. Learn about them and fish them. Also fish Senco style stick worms in all ways possible, unweighted tx rigged, unweighted wacky style as well as weighted both texas style and wacky weighted jig hooks. Go to Bass Pro. Find the Perfect Finesse Worm hooks. Fish all sots of plastics on these texas style hooks with the weight attached. We use these with Kalin 5 inch Lunker Grubs. Get them in watermelon red flake and bluegill colors. Find your favorite ring worms or small 4 finesse worms and fish these on the Perfect worm hooks. Small to mid sized creature baits and crawfish can also be fished that way. Next add some stand up shakeyhead jigs. Fish some of these same baits as well as the straight tailed worms like Z Man sells for shakeyhead fishing.. What I have said is a few different pieces of hardware that will let you fish the same baits many different ways.
On your current baitcaster you can throw the 1/2 and 3 /4 rattle traps, small to mid size diving crankbaits and small 1/8 to 1/4 ounce spinnerbaits. Get some Reaction Innovation Skinny Dippers or Keitech swimbaits. Throw these on lightly belly weighted swimbait hooks. For deeper water throw them on some of the 3/8 to 1/2 ounce swimbait jig heads (these look like a fish;s head). This rod will not be ideal but should throw some mid sized jerkbaits. Say 3 to 5 inches or up to about 5/8 maybe.
Lastly if you get this heavier rod, then I would fish 3/8 to 3/4 ounce spinnerbaits ,jigs with crawfish trailers, heavier plastics both on carolina rigs and texas rigged, This rod should throw topwater walking baits, chatterbaits , and lots of other baits.
Good Luck let us know what you get and how it works out.