Shit You Should Be Listening To

I'm not here to tell you that your choice of music is wrong, I'm just saying that if you're not listening to these bands than your choice of music is inferior to mine.

First off, I already told you about Rosetta, but if you still haven't checked them out, well I don't know what the fuck you're waiting for.
But let me tell you about a few of their sub-genre partners.

Irepress
Irepress (pronounced: ear-repress, yes they know it's not a real word) dabble in the world of instrumental post rock, but they pull in musical infulences from many different styles of music. Instrumental rock can be hard to get used to, especially when you're not a musician. Not that musicians are better than anyone, it's just that they generally have more of an ear for music and might be able to appreciate the music on a different level. Irepress have two albums out, Samus Octology, and Sol Eye Sea I. Samus Octology relied on heavy riffage, atmospheric melodies, jazz-like breakdowns, and even a trumpet. Plus, if you time the album correctly it will synch up really well with The Goonies (a band favorite). The new album Sol Eye Sea I pulls in even more musical influence than it's predecessor, calling in some R&B singing stylings (sounds a lot better than it reads), some more keyboard work, and even more odd time signatures. A definite must have for folks who just like to put on some music and space out.
Sound Comparison: Pelican goes to Latin America.

Mouth of the Architect
Mmm Doomy Post Metal. Look, you're gonna have to deal with all the sub-genres. This is what happens when you step away from MTV music. MotA are currently 3 albums and one split into the game. Each album getting progressively better than the last. Time & Withering was their first album. Not many tracks on it, but it did feature song "The Worm" which is easily one of the best songs the genre has to offer. The Ties that Blind was their follow up, and features more droning that you can shake a heavy stick at. With songs reaching the 13+ minute mark it'll be an album that'll take time to listen to. Their last full length came out last year. Quietly features shorter songs, more singing, and less instrumental jam sessions. The band almost had a falling out when their guitarist and (admitted by the band) key music writer decided he needed to express himself in other ways. So while Quietly might not have as many catchy melodies and tempo changes as the previous albums, it's still great in its own right.
Sound Comparison: Cult of Luna with more vocal range.

This Will Destroy You
That picture alone, which was featured on their merch, should be enough to get you into this band. Pure instrumental post-rock with expansive, largely distortion free melodies. And the melodies are infectious. TWDY have two full lengths, Young Mountain, and Threads. Each album is a treat with their simple but beautiful music. Another nice thing is that the songs aren't that long, so if you have trouble listening to any song for more than 5 minutes than you're in luck. Otherwise you'll just be putting the albums on repeat. Hell their music has even been featured at the White House in a short film about Katrina. This band might be a good introduction into the instrumental post-rock genre for those of you are not sure about 5 minutes of music with no singing.
Sound Comparison A manlier version than fellow Texans Explosions in the Sky, but a less grimey than Mogwai.

Well that's all for now, I don't want to overwhelm you with too many. But you can be sure that The Shit You Should Be Listening To will be a reoccurring post. I consider it a public service.