4e works a bit differently. The cameras are an assumed part of the suit, the suit provides a flat stealth bonus, and it can't be upgraded to perfect invisibility. (In an unusual fit of realism, they note that the mod is only useful if the armor covers most of your body and you don't have equipment hanging off you.) There's also an armor mod to reduce thermal signature a lot, and by any RAW you can have both on the same suit, though by the advanced rule option you can't add much more.