Hi. What GoodSki above says about these boots makes good sense to me, and explains a lot to me, a lighter skier.
I currently ski on all three Langes, the 13/14 RX 130 LV, the 13/14 RS 130 (just as low volume) and the '12 World Cup Comp 140s (even less volume). (Don't know the Atomics.)
I've also had Lange RX 120s, which are great for me also, but softer. Better for low speed carving as opposed to sl/gs type edge riding, than the other three, and enjoyable at any speed.
I've liked all three Langes being mentioned. For me they improve in most ways on the RX 120s, and I use them all in overlapping but different situations.
I have a B/C size width in toes and narrower ankles/heal, and Langes fit great for my feet, no mods required.
All three boots started out stiffer, even uncomfortable, but in 3-4 times out got noticeably more comfortable and less stiff, near perfect fit for me. And great flex.
I'm 5'10", 145 lbs.
26.5 size. I like a forward tilt/lean underfoot.
To me, the RX 130s are too flexible to be a race-type boot, but fun to carve fast and play on. They are a powder/bump/relaxing frontside boot for me.
Oh, and they are built with a more upright stance, higher than I like, so I have a triangle wedge under each heal to put me farther forward, to where the other two boots are to begin with (used for 2+ seasons).
More upright, new technique, fat ski slarvers of all skill levels often like this boot.
For some I've talked to, the liners get packed out and need replacing after a single season or so of hard use. (Mine still seem to be fine.)
The 140 WC Comps I use when I want to roll up the ankles, really drive the tips and get a high edge angle at speed on, say, a pair of GS frontside near-race charger skis. Race imitation. These boots are a decided advantage on edge at high speed. Fun!
For me these boots fit, work, but are a bear to get on, and tend to numb my toes. I don't use them in bitter cold weather. But maybe after half a dozen more uses they will relax more, flex more easily, and stop being as tight/cold (used ~ a half dozen times so far).
A big guy might find them less rigid, especially in the flex. They are perfect for me for what I use them for.
Last, like Goldilocks, I find the RS 130s to be just right, often. That means for a bigger, heavier guy, these things might not be stiff enough for hard charging or racing, if you really drive forward well. Juniors, U18ers, and lighter weight racers do use them routinely.
But for me, they have great rebound--pop--that I like in many types of skiing. A perfect forward flex, after only ~ a half dozen uses. Surprisingly easygoing all mountain/frontside boots, for me, so far.
Hope this helps.
Edited by ski otter - 9/14/14 at 3:48pm