I voted the first option, I really do believe that Atari is a good enough option at SS when healthy.
I understand some people who have concerns with Atari in coverage, but I for one don't share them a whole lot. From what I remember, in 07 Atari was in position to make plays in coverage (like break passes) but he didn't. I don't immediately recall any glaring play where I was sure Atari couldn't have covered the player to save his life. I think it's a matter of Atari needing more seasoning to realize that instead of trying to push a player down after a catch, he should try and go after his hands to force the incompletion. I think Atari just needs some time to calm down on the field, and just pick up the little nuances of being an effective player in coverage. Being friends with someone like Al, I'm sure Atari will understand the smaller details of effective coverage sooner rather than later.
What I like most about Atari is that he is a dependable Safety. If Leroy Butler is to be believed, the loss of our "sure" safety in Atari led to a loss of confidence by all the DBs. Makes sense, you want to have a S that you know is assignment sure and tackle sure. In 07 Atari was both.
If you look near the halfway point of last season (week 6-7) then you'll see Atari was on pace to record over 100 tackles, have 4 FF and 2-3 sacks.
Those are pro-bowl type stats, and I think it's fair to say Atari played at an all-pro level in parts of his first year starting. What I liked most of all about Atari was that he showed late in the season that he was starting to understand that you could be aggressive on the field without resorting to taunting players, talking trash, etc. (not to say there isn't a time and place for it during games)
We'll be fine at the position IMO assuming Atari stays healthy. That's not a given though, so I'd love to have some more competition at the position, preferably a vet.
On a related note, I'm intrigued as to what packages could be created with a healthy Atari, Nick Collins, and Rouse. A 3 Safety package would be really neat, and considering Nick's speed and Atari's propensity to be an effective blitzer that showed in the 07 pre-season, some interesting possibilities may lie in a 3 Safety package...
The NFL: Where Greg Jennings Happens.