I use all of them.
AWeb is now free, and does a good job for most sites. I registered AWeb in the AmiTrix days, and since it's open-source, you have the opportunity to give back to it.
I registered Voyager through the various NetConnect packages over the years, but I think it is no longer available in that format. Still, it's a really nice browser with some supported features just not found in IBrowse and AWeb.
IBrowse. I registered it, I use it. I'm posting with it now. It doesn't support as many layout tags as Voyager, but has much of the basic features that have dissappeared from Voyager.
To sum it all up, it's not which browser you get, but what order you get them in!
