Two major brands are Tramontina and Condor. The first is Brazilian, the other made in El Salvador and includes a deluxe grade or two.
Go to YouTube for videos.
My son recently bought a Tramontina with 18" blade and sheath at Home Depot, less than $20 in both.
My favorite machete photo is of model Ana Beatriz Barros, with a Tramontina stuck in the lower part of her bikini and holding onto a branch over a stream in her native Brazil. If you Search for photos under her name, you'll know this pic when you see it. If you're married, better Search while your wife is away, if she's the jealous sort.
I may be the only man who has seen that pic and noticed the machete and figured out the make and blade length.
ABB recently married some billionaire,so will probably quit modelling. Pity. That girl can do things with her eyes alone that should be illegal in public, ha!
You probably want a 14-18 inch blade, and will probably want to dress down the wooden handle
scales to meet the tang, to avoid blisters. One company offers this and a sharpening service for about six bucks. I think the name is spelled Baronyx. I plan to buy an 18" Tramontina from them and get those services. But they didn't sell sheaths when I last checked. The Machete Store has sheaths, but not the handle and honing services.
I want a rounded butt like that on the machete in the pic with Ana Beatriz. Those seem not to be sold here in 18" length. You can get that shape in a 14" blade. Hers has a black handle, probably plastic. Those sold here are mostly wooden handles, in similar models.
My only present machete is a Corneta with a very handy 12" blade, a copy of the Collins No.127. (Collins ceased business about 1966.) However, that Corneta company in El Salvador is now out of business, and another firm uses that name. I bought my Corneta about 1985 in an Army & Navy store with a canvas sheath. It's been excellent, but I want an 18" one, too.
I do not mind being mistaken for Indiana Jones. (See above post with snide reference to Jones and advocating clippers.) In fact, my love affair with machetes originated with jungle adventure films as a boy.