You initially mentioned two Armadas that have rather different applications. As someone pointed out, the TST and similar skis have the potential to ski well for several days after the storm whereas the JJ and similar are likely to have decreasing usefulness the further from the storm day you get. That is the choice you have to make and there are several good choices in each category. Although you are big, that doesn't mean that you necessarily have to get a stiff or beefy powder ski. Personally, I'd suggest something in a medium flex in a long size. The stiffer ski will give you stability at higher speeds but a medium flex ski will be more maneuverable and easier to turn in tight spots.
Having said that, the TST is a super fun ski but yes, it might be a little soft for you. However, two medium flex skis to consider are in the one-oh-something range are the Atomic Ritual and Head Rev 105. The Nordica Patron is another great choice among the more powder oriented types. We sold a Rev 105 in 191 to a guy that is a little taller but marginally lighter than you some weeks back. He has many more years of skiing than you do and is probably a better skier. He's been back a couple of times for other things and commented how much he likes them. Although not a powder specific ski, I personally find that type of ski really good for all but the deepest days and very useful for several days afterward as well.