riding impressions of the dragon vs. the m-8/1000....m sleds are easier to ride in the powder....both sleds go very well, but different techniques are required to get the best out of both....if you ride both sleds back to back, you will likely think that the "best" sled is the one that is closer to what you're already familiar with.....i personally like the m sleds a little better, "flickability", or the ability to go from side to side quicker is better because they initiate a turn easier....the powderclaw track gives you a clear advantage in most snow conditions, especially when going slow in the trees and deep snow....dependability of the m-8 is a step ahead of the d-8.....as to your list: no controller needed for listed m-8 mods, stay stock on the m-8 air intake unless you are a good tuner, use a fuel controller that will both add/and subtract fuel and are willing to take the time to get it right, the slp pp skiis are good powder skiis only, not a good all-around ski (too aggressive in set up/spring snow, or heavier snow conditions), the slp slt ski is a better overall choice, boss seat has better foam and is more comfortable, too much rise in the handlebars means you have to throw the bars in a much greater arc to get the same movement of the sled, unless you are very tall, 6'4" or so, the standard adjustable bars will work great, under hood bags are a good idea, vent the lower side panels, gas rack on the back for whatever, cat makes a good one.......when you get your sled (m-8, i assume), lower the front of the skid down to the lower mounting hole (about 3/4 inch, hole already marked on the inside of the tunnel), let the limiter strap out all the way.....experiment with the air pressure in the rear shock to find what works best for you (i use 105 lbs..190 lb rider, aggressive, but no cornice jumping)....ain't having a choice grand?...