Originally Posted by LoathsomePete

If you're after that kind of a Doom metal sound then definitely check out the Swedish epic Doom metal band Candlemass, specifically their 1986 debut Epicus Doomicus Metallicus, that is an essential metal album that no self-respecting headbanger would be without.

You may also want to try out another doom metal band called Witchcraft. Their 2007 release The Alchemist had a really nice old school doom sound but with plenty of newer psychedelic overtones to it. It's kind of a polarized album though so you may like it or hate it, but it's a band that nobody else has mentioned that is at least worth a look.

Then of course you might find some gems with the American stoner metal bands like Sleep and Kyuss, two of the most popular. If you go that direction you NEED to give Sleep's Dopesmoker a try. It's an hour long track that is just all over the place, but it may be a little too esoteric for your first experience, but it is one of the most regarded stoner metal albums of the last decade. As for Kyuss, well any of their albums are worth a listen but their 1994 Welcome to Sky Valley is often the best place for beginners to start.