[Suicide Junkie]

IMO, the armor value already sucks.

Try comparing your stealth armor to 3/4 of a shield generator.

At max tech, you're trading off 15% ECM for +200 hitpoints.
Therefore, unless your ship can survive 1300 damage points being flung at it (either by dodging or shields/armor) the Phased Shield V is better than the stealth armor.

EG: at a 60% to-hit, your ship needs 3 or more shield generators in order for the Stealth armor to be worth it.