Speaker cable termination options

Banana plugs are more consistently reliable, and better for "set it and forget it" situations.

These silver over copper are my absolute favorite for DIY cable making.  In large part because they use a separate contact surface and spring.  That is, the main contact surface is big and solid, making optimal contact with the cylindrical surface, while the spring is a separate component that is really very solid. 

In my experience, spades are not as consistently reliable.  Meaning, they may come loose with no effort at all, either from NO contact or slight cable movement.  This is especially true when very hard materials are used, including the pot metal in really cheap spades, or the nickel or rhodium plated kinds of spades or connectors.  So, also, avoid rhodium and nickel.  Of course, some one always pipes up with "oh but my amp has $3,000 Cardas or Mundorf connectors and will never let go..." and sure in those cases... but for the 95% of all other gear, bananas rule.   Over the years I've had many spades just magically twist loose, and NEVER ever had it happen with a banana of any sort. 

If you must get spades, the WBT with spring loaded spades are about the only one’s I’d take seriously.  

I recently came out of the cable rabbit hole for now anyway. I’m very impressed with the solid feel of Kimber SBAN bananas. I tried cables with BFA as well as locking and didn’t care for them. This is after using bare wire for over forty years without issue until I became cable curious.

Bare wire at both ends. Two fewer connections to worry about and also cheaper. 

@corelli Viborg VB401S Speaker Banana Plug Connectors Screw Locking,4MM Pure Copper Speaker Terminals. Each has their own signature sound, as they should. I've been VERY happy with these for years now.

Since this is not an audiophile set up, I would not consider any of the expensive options. There are plenty of pretty good affordable options. That said, please do avoid Amazon specials, there are countless stories about low cost cabling being poorly manufactured.

I strongly suggest quality brass bananas and low oxygen copper wire.

years ago, in my old system, I made my own cables from Belden 5000UE cable purchased from Bluejeans Cables and their compression style banana plugs. This is, imo, the absolute best budget wire for a stereo or home theatre. I still use the same cables for my surrounds.
 

Details below. 

First, I suggest you do not use bare wire. It is not a matter of it "might" oxidize, it will oxidize. Bare wire is by far the worst method of connection this this and many other reasons, you can safely ignore the "I never had a problem with it crowd."

I suggest also you not use spades, and especially do not use locking bananas. Copper and brass are too soft for spades, when over tightened they will dent, and then they will never connect properly again. Very few people (aside from the "I never had a problem with it crowd.") can tighten spades correctly. Same goes for locking bananas, except there you have the option of damaging your equipment from over tightening. Steel is strong enough for spades, but you want no magnetic materials in the signal path on any audio equipment regardless of the quality or cost.

Silver bananas suck. Silver is far too soft and loses any springlike quality is has quickly. They sound awesome for a short time, then they get loose on their own and the signal degrades. My cables are heavy enough they would fall out of the speaker after a few weeks. Same goes for pure copper to a lesser degree.

Some amps can be badly damaged if your speaker wires come loose.

Copper wire will degrade all on its own unless you use low oxygen copper. You will not hear any difference in your system today, but you will in a couple of years.

Gold over brass has been the industry standard for decades for a reason, do not get sucked into "we live in the future and have better materials." We have the same materials today as we did in the 30's and 80's.