Ages are 16 and 13
5'4" 115 lbs
5'2" 105 lbs
Both are probably advanced-intermediate level skiers seeking to progress their skills. Neither is an aggressive skier or overly timid, although I'd describe the 16 yo as more laid back than her sister (as far as skiing goes).
Ski the local ski hill in MT 8-12 times per year, so mostly hard pack and crud, with some ice and, in a good year, some powder. Both like to play in the powder/off-piste when it's there; don't like moguls but want to get better at them. Both will dabble once in a while on easy terrain park features, but not really to any significant degree. We also try to get to one of the resorts once per year (Bridger, Big Sky/Moonlight, or Whitefish), but that doesn't always happen.
Boots are first on the list, and overall budget is limited. So, am considering something like K2 Missconducts or Atomic Supremes (either last year's Supremes, or this year's with carbon backbone). I think both have a little early rise along with being twins.
159 Missconducts seem a reasonable size for the 16 yo, but the 13 yo seems to be in-between sizes. Concerned that 149 would too short, but in the store the 159 was just over her head (not sure if she'll grow much taller). Supremes come in a 157, which in the store appeared to actually be more than 2 cm shorter than the Missconducts, and might be a possibility.
Am I in the ballpark with these models and sizing, or are there better choices to consider?