By smaller, are you sure you want to go for that sort of a layout?
I personally feel that the layout is squashed/clumsy, where your hands will bump across the arrow key cluster during typing.
The keyboard is also wireless, which is a no-no on my books, but if you're looking for a wireless keyboard, more power to you...just not fascinated with a battery under a keyboard which ends up being a problem if it fails and it needs replacing.
If you're looking square at Keychron range, you can look at the C1, is less than 60USD. I personally own Ducky's Mecha SF in the Limited Edition Emerald Edition in Cherry MX Silent Red's. The build quality on the Ducky's are fantastic but you do pay a premium for the heft of their builds. Mind you, the board I picked was a custom mod/system build I'm planning hence the Limited Edition keyboard(s). If you were on a medium'ish budget, you should look at a 65% board, hotswap, non RGB and wired keyboard. TKL's are a good way to negate the missing space but take advantage of the space.
Also, you take a look at the HyperX Alloy Origins 60?