I have no experience with these skis, but i have read some reviews for them, so take my 2cents with a grain of salt:
The Metron B5i skis are truly carving skis, with a small turn radius and all. They are okay for all conditions, but favor the groomers a little more than anything else. While these skis are technically, the "top of the line" for Atomic Metron series, they arn't the fastest Metrons, although you could say they are the most forgiving. the 11B5C is the fastest ski of the Metrons, and it is obviously a little less forgiving. Also, don' forget that they are quite heavy for skis, if that matters to you (meh, personally, I really don't care unless I am on a 10 min long chairlift ride). So if you want to carve mainly on groomers, then this might just be your ski.
On a more seperate note, this was one of the most popular ski lines in the recent past. The Metron could be described as a "fad" ski, it is "in" for maybe 2-3 seasons, but people are getting tired of it now. It's the same formula, wide tip/tail, narrow waist (aka, fat looking skis), packed with technology (like Beta 5). So yeah, they are getting old, people are going towards other ski manufacturers and lines nowadays. I would suggest that you wait another season, as I wouldn't be all that surprised if Atomic replaced the Metron line, I mean, all their lines are replaced every 2-3 years (except for the Race lineup, but that's obvious), so the Metron isn't really new. Plus, I'd be looking forward to their "Metron replacement", unless they want to stop making Metron-esque skis totally.