I use apple’s extended USB keyboard and a G400S from logitech
That's the setup I have as well.
"Best" is too subjective to definitively answer, particularly when it comes to input devices where personal preference plays such a large role. What's best for me is not necessarily best for anyone else.
In my experience, which began with manual typewriters, the best keyboard for me now is the late, great Apple A1243 wired "Keyboard with Numeric Keypad." It first came bundled with the original Aluminum iMac in 2007, and it's the keyboard I've been using since. I had doubts that I would like anything better than the reknown Extended Keyboards that preceded it, but was pleasantly surprised.
I like the feel of the keys, and it's quiet, well-made, durable, and compact, despite the full layout. Unlike past keyboards, the low profile, doesn't require any wrist pads, and it has enough tilt so as not to be completely flat. Apple said at the time that the frames were made from the remnants of the iMac's case manufacturing process, so there could be no better aesthetic match. The two USB 2 ports are outdated by modern standards, but could still be helpful in certain circumstances.
Though they were discontinued in 2017, I was lucky and just got a deal on one to go with my new Mac, but they're still readily available brand new on eBay, either in service part packaging, or NOS sealed retail packaging (which also includes a USB extension cable). And, they're commonly selling for $20
more than their original $49 list price, around the same as what people ask for the old Extended Keyboards(!).
The M110LL/A version has an F4 key configured for Dashboard. The M110LL/B version changed the label and function of that key for
Mission Control LaunchPad, but the two are otherwise identical.
In my perfect world, there would be a backlit, wireless version with slightly dished key caps, but alas, that remains a dream.
When Apple finally came out with a Magic Keyboard with Numeric Keypad, I thought it would be the one, but alas, while the keys feel ok, it otherwise lacks the build quality of the old wired keyboard. The Al casting is actually pretty nice, but, like some of Ive's thin-at-all-cost designs, it's not up to the task of real world usage and can bend/warp as a result. Not gonna pay $129/149 for a keyboard that can turn into a banana and won't sit flat on a desktop.
I also wanted to like Matias' offerings, but it seems that instead of being the perfect alternative to Apple, they still have issues with functionality or build quality, dating back to the days when the Tactile Pro was touted as the second coming, but wasn't. The Amazon reviews for other keyboards created enough doubt to stay away.
As for the mouse, I could keep happily using my old Kensington Optical Elite with the new Mac, but need to put to good use a Logitech G400s I acquired for half price when Radio Shack went belly up. It traces its lineage back to the classic MX500.
I tried, and returned the Satechi M1, which while a nice mouse, has too low of a profile for my taste, like the Magic Mice.
But, YMMV.