OK, so he has 2 posts, guys. And seems south of 20. OP: Using all caps except in an acronym means you're shouting and way too urgent. No one likes being shouted at. More generally, no one can magically tell you what ski to buy; ski forums are to advise you on comparisons, give you opinions based on experience. If you've already read all the reviews, then it may be time to make your own call, or if you can't, then rethink your priorities.
At your size, you should be looking at skis in the 180's. If planning to learn to ride switch means freestyle to you, launching off natural features, landing backwards a lot, then definitely go for something like a Hellbent that's closer to symmetrical and a traditional sidecut. If switch means that you want to occasionally land backwards, ski a bit backwards to take advantage of features, use the falling leaf effectively in bumps, then most skis with even a flip tail work, and for sure "directional" skis with tail rocker, which is not vastly different than a twin. In second case, look for a more centered mounting point and not too much taper. The S7 works decently - I'm trying to improve my carving switch - but obviously not a freestyle ski. Have heard the JJ is better because it's more symmetrical. (Also the lightest and most nimble of the three, BG is the heaviest and most planted at speed, S7 in the middle. ) OTOH, 5-point designs like the S7 and JJ can go very odd in a hurry if you shift your CM suddenly toward the front or back convex curves. You may find the ski going the opposite direction you expected.
Unclear what a beast in powder is, if you mean plenty of float, all these work. If you mean planted at mach looney, none of them work. Well, the BG might be OK. But other skis are better. If you mean handles powder well, that's mainly the pilot.
Also unclear what "sharp turns" in bumps mean with a 115 mm waisted ski. You don't wanna carve them in bumps usually. If you mean quick pivots and smears, any of the skis you mentioned will do fine, probably in the order of JJ-S7-BG. Try TGR for more fat ski reviews, plenty on the skis you mention, suggest reading for a while to get the sense of the place before posting.
Finally, if you're intermediate to advanced, want to learn to do all the stuff you talk about, suggest you get off the double blacks. Practice your craft on forgiving blues. Take a few lessons. Then go slay the backside...