For anyone curious as to what the DLC suits look like, there's now a Youtube video that showcases all of them:
http://www.youtube.com/watch?v=NmZQ3hzy-c8
A few look pretty awesome, but I hope Visceral releases new Suit/RIG designs in the future instead of just altered existing suits and stats. Though I like the sheer amount of different suits you can possibly get. Next playthrough will be in the Riot Suit and Forged Engineering Suit.
So there are five basic designs:
Engineering Suit (in-game)
-Elite Engineering Suit (in-game)
-Forged Engineering Suit (DLC)
-Hazard Suit (DLC)
Security Suit (in-game)
-EarthGov Security Suit (DLC)
-Soldier Suit (Hardcore Mode)
-Triage Suit (DLC)
-Riot Suit (in-game/supposedly comes with iPad version, but I somehow got it)
-Elite Security Suit (in-game)
-Zealot Suit (CE-only)
-Arctic Suit (supposedly for finishing Zealot mode, but I haven't played it yet)
Vintage Suit (in-game)
-Elite Vintage Suit (in-game)
-Bloody Vintage Suit (DLC)
-Heavy Duty Vintage Suit (DLC)
Advanced Suit (in-game)
-Elite Advanced Suit (in-game)
-Shockpoint Suit (DLC)
-Agility Advanced Suit (DLC)
Hacker Suit (Ignition-only)
Gabe Weller's RIG (Modified Security Suit - Dead Space 2: Severed)