I'm putting together my army, and I was wondering whether to go with crisis or stealth suits as elite choices. I'm thinking crisis with a helios build because all the armies I'll be playing will have 3+ or better saves (mostly marines and chaos.) While I think the stealths are great, they won't be able to penetrate any of the infantry. I have considered how effective they can be against vehicles (when hitting from the back) but my heavy support (2 broadsides, 2 hammerheads) should be able to handle those. Is there anything else to consider?