Matt:
I have many long-stemmed pipes (more than 20), although I'm not sure they would all qualify as "churchwardens". Some of them are quite large—like the Pipa Croci Calumets. Three of them are meerschaums; the rest are briars.
The main thing to know about churchwardens or any long-stemmed pipes is a question only you can answer—namely, "How do you want to smoke it—hands-free, or holding it in your hand?" Others who've posted here have correctly noted that if you're sitting down and you have at least one hand available to hold the pipe, then you can smoke straight-stemmed churchwardens.
However, if you like to smoke hands-free (for example, while you're working at the computer), then you'll want a bent churchwarden. The vast majority of mine are bent. I can easily hold them in my teeth and smoke to my heart's content while working.
I'll add my approval to the chorus of those who like Stanwell HCAs. The bent Calabash shape is nice. The Cutty shape's stem is too straight to smoke hands-free, but it's a great smoker. Savinelli churchwardens are also nice. I have one dedicated to Coniston Cut Plug, another one dedicated to VaPers, and one for various Lakeland flakeweeds.
Bjarne made some very nice bent churchwardens. Some of them are humongous, but he also made some smaller ones. You can occasionally find them as estate pipes. Dunhill's churchwardens are nice, but very pricey, and they tend to be quite small (usually Group 3); consequently, you have to be careful not to let them get too hot. James Upshall churchwardens are relatively rare, but they're terrific smokers.
I should mention Peterson churchwardens; I've never owned one, but I own many other Peterson pipes, and they're great smokers. If I "needed" another churchwarden, I'd get a Peterson.
Those are all briars. Meerschaum churchwardens have some advantages over briar. They're much lighter, and it's probably impossible to burn them out. However, you shouldn't handle the bowl directly, especially when the pipe is warm; the oils on your hands can leave marks on the surface. But there's plenty of stem to hold onto. And, as you probably know, meers are fragile; you don't want to drop them. Fortunately, most meerschaum pipes come with a fitted case, which protects the pipe. Altinok makes some nice meer-wardens.
:joker: