fixed, folding or collapsible?
How much ya wanna spend?
I went cheap on mine, buffer tube adaptor & KAK Shockwave. Back then there weren't as many neat options. Fairly light & while not adjustable on the fly, it's adjustable for LOP. Can't remember what I paid for the adaptor but the Shockwave tube & blade is usually $60-$70. Using a buffer tube isn't the slickest looking setup but allows for the most options in braces.
I've always liked the SBTEVO, looks good, folder, and SB braces are comfortable.
And while not the cheapest, the factory folder with a Tailhook mod 1 is one of my favorite looking setups.
I got mixed feeling on the collapsible ones. I've had an MP5-22 rimfire for years and while the collapsible stock looks cool, not very comfortable. Like an AK underfolder. Not as big an issue if you're mounting optics high and using a chin weld but not as much fun getting down to a cheek weld for irons.