I was, almost, in the same scenario as you, but I just "thought" I needed another circular saw. I have a Craftsman Professional 7 1/4" that I have had for close to 15 years.
I have kept it maintained, and just recently I started paying attention to my blade choice. (Yes, I'm green to woodworking, lol) NOW, I have an appropriate blade for everything from concrete/hardi board to diamond blade for tile.
That saw has definitely done its work. Recently I bought a Kreg Accu-Cut jig to break down sheet material and that has worked great for it's intended purpose. It has a sled that is attached to the saw, so I leave it attached to the corded saw now and after extensive reading and research (Thanks internet, lol)
I broke down and bought a Milwaukee M18 Fuel 7 1/4" battery operated saw. OMG! How the technology has changed. I put a cheap 40T Carbide blade on it and let me tell you, it is a treat to use. No cord to get in the way, PLENTY of power, accurate and readable position markings, soft start motor, blade brake....
It was expensive at $249 bucks, but it was money well spent, IMHO.... It's always ready to go, and I don't have to have the extension cord getting hung up on EVERY SINGLE thing in the garage. I built some cabinet faces using it and a router, they were for the outdoor kitchen, but they came out just fine for that purpose.
So if I were in your position, I would try to either fix, or stay using one of your corded saws, and then decide which battery powered platform you like, Rigid, Ryobi, Milwaukee, etc. and go with a battery operated model, I think you'll be glad you did. Trust me, it took me two weeks to decide and coerce myself to buy the Milwuakee, but I would do it again in a heartbeat.
Again, just my .02 cents.... Good Luck.... Here are a couple of pics of the cabinet faces I made... I'm no cabinet maker, but I needed them and they are suitable for my outdoor kitchen, so don't laugh... LOL.....
I don't know but IMO those are pretty nice cabinet doors!
I've not attempted anything close to that level of detail
As for the cordless - they are still out of reach of my budget.
I currently have 2 battery systems - B & D and Dewalt - both 18v the dewalt has become my favorite and consequently I bought a dewalt corded drill on sale as well so I'm leaning towards that mfg for other things
I had 3 battery systems but I've shut down the Makita as they kept changing battery styles and now the batteries are way overpriced for my old units. I don't even know why I'm keeping them as the batteries are now dead and junk!
I actually have a B&D cordless but it drains the batteries way to fast - I can just about get in 2-3 cuts and the battery is done!
That's pretty much why I prefer corded saws - no batteries!
I've been pricing cordless saws and I like the dewalt best. I settled on an inexpensive corded Ryobi as a backup it weighs in at 7 lbs, my Craftsman model #315109231 circular saw weights about 12 lbs and is much too heavy for me.
I also have the kreg cross cut jig - I always forget I have it LOL and end up using a 6' level clamped as a guide!
Oh and FYI - paragraphs are your friend - it's just easier for others to read when you write long posts.
Thanks for your response and information