I'm not a huge fan of the "stock" telestocks for m4s and similar ARs. They're on the flimsy side, and there's considerable wiggle room between the moving part and the buffer tube.
I do, however, love the Ace SOCOM stock. Absolutely ROCK solid. Comfy foam cheek pad. And last but certainly not least, there's a meat tenderizer on the bottom in case you ever want to use your AR as Thor's hammer. The only drawback is that there isn't a whole ton of adjustability.
I would pick the standard stock over the regular telestock every time. But the SOCOM stock beats both. It can get pricey, but I found mine for $129 from an ebay dealer. Search the completed listings and you'll see the auction. It appears there were still some left when time ran out, so I'd send the guy an email.