OP here, this is the team I came up with. I spent a couple of hours talking with a friend to put this together & it's my first "competitive" team, so please be gentle.
http://pastebin.com/raw.php?i=R7HZES2tRunning a double tank core with Skarmory & Blissey.
Skarmory is my defogger & physical tank, she has hazards & things.
Blissey is the special tank, and I brought toxic to force switches onto the spikes & stealth rocks.
I'm also bringing 3 sweepers. I tried to max out their speed.
Chandelure is the special sweeper with heaps of type coverage. I chose him because I figured fire & fighting would give Skarmory & Blissey the most trouble, and Chand does well against those.
Mega-Scizor for the physical sweeper. I like him in general and he's got some pretty cool stuff too. Also, if Technician works with Scizorite, his Acrobatics would hit like a truck.
Landorus is my third sweeper, and I chose to go hybrid here. Not as much of a glass cannon as Chand or Scizor, but I thought I'd be able to mind game with the mix of physical & special moves.
Lastly I've got Suicune as a sort of bulky support-ish semi-sweeper. I figured it would be cool to have him use Tailwind to help set up the main sweepers while having the option to dish out decent damage and soak up a few hits while it's on the field.
I think we thought this through pretty well, but is there anything blatantly wrong/stupid regarding my team setup? I'm actually kind of proud of it.