Have a look at flashlightreviews.com and ledmuseum.org and see if anything grabs your attention. In the $20 range, there aren't a lot of made in the USA LED options that I'm aware of. You'll probably either have to consider spending more money or consider buying something made in Asia.
If you'll consider the Asian-made lights, the Fenix is one of the current 'it' lights that almost everyone is raving about. Nice, wide spillbeam, quite bright, pretty good runtime and most off all, at a great point on the cheapest vs smallest vs brightest of the small LEDs. I'd suggest rechargeable NiMH cells for better performance vs alkalines. Almost exactly the same size as the X1.
The Infinity Ultra isn't much different brightness-wise than the X1, but it has a very nice, wide beam whereas the X1 concentrates all the brightness to a small spot. Both have their purpose, but I think the Ultra is radically more usable.
Other even cheaper options include the Dorcy 1xAAA and 1xAA lights from Walmart, Target, Meijers etc... The 1xAAA has a single LED and the 1xAA light has three LEDs. They are similar to the Ultra but cheaper and have a pus momentary/twist on tailcap vs the twist head of the Ultra. Though I've given all of mine away, I think the 1xAAA is one of the very best values in small LED lights and a lot of guys will mod them with a brighter LED (Nichia CS) that still gives the same runtime.
For American lights, the Peak lights are nice but range in price from about $40 up to more than $100. If you'd like something all metal, you might look into them. Or consider getting a used ARC AAA. They are back in business but there are delays in getting them because the demand is much higher than the supply. They are among the best loved, if not the very best loved lights on CPF.