I suggest staying away from 40 series. Too big, and a noticeable loss of power. All though the bowties are lighter than most 40 series theyre still 2 times heavier than the originals. If your running both on road and off road then get the stock traxxas maxx tires if your going strictly dirt then go ahead and get something similar to bowties. Asphalt and cement eat up tires like a 600 pound guy eating a cheeseburger especially tires like the bowties. Wheels vary as long as you get the right size wheel (depends on the tires you choose.) Check out amainhobbies.com for a huge variety of tires and wheels. Just dont get the wrong kind.
Losi 8ight shocks are very nice shocks but I'm not sure how well they would fit the maxx. I know the Kyosho Neo series shocks would fit much better and run about $22 for a set of 2 on ebay, but they are plastic. The 8ight shocks are nicer as far as durability and reliability since theyre aluminum, but the Kyosho Neos I'm sure will fit a lot better as they are connected to the shock tower via ball bearing hex screw that goes directly into your shock tower versus a long screw through your shock tower, a shock mount that goes around the screw that varies in size, and a nut that tightens it. I have the losi 8ight shocks on my XTM XT2 buggy and I had to do some drilling to both my a arms and my shocks to make them fit. I also have the Kyosho Neo shocks on my XTM XST which were an exact fit with no mods at all where as if I were to get another set of losi shocks, I would have had to make the same mods I had to make to my XT2. I also think the front shocks from either company would work well with the T maxx because theyre so short. The a arms may not go up all the way when landing jumps forcing the shock body to act as a shock as well. It may stress out the shock body and cause it to crack or break in pieces. You also dont want your shocks too stiff because they can bend really easily if they are. On a truggy the a arms usually sit level with the height of the chassis and sometimes the rear of the truggy sits a little lower as softer rear shocks make landing jumps easier to control preventing the vehicle to bounce around so much on landing. Also the plastic rpm a arms are definitely a must for the T Maxx. My Maxx though has aluminum front a arms on it to keep the front end planted on the ground, but the rears are plastic.