The Fuji's come with the "standard" #4 tip which is just right for most medium thickness paints including canvas coatings. Mine is gold colored and says "4H" on it. Don't know what the "H" means but it came with the gun. Never felt the need for anything finer or coarser. I'm not sure what diameter that is, it looks quite a bit smaller than the tips on the Wagner guns. I think the Wagner is optimized for Latex and similar thick paints.
You asked about brushes. My Fuji came with a single cleaning brush that really wasn't quite up to the job. The draw tube readily clogs with paint if all I do is try to clean the gun by spraying hot water through it. You can very adequately clean the gun turning it upside down under a hot water faucet, opening the needle all the way and filling the upside-down draw tube with hot water. Then turn it over and drain it about 3 or 4 times until you no longer see paint in the water. Then push the large air input port up against the faucet and let hot water flow for about 30 seconds or so. And brush any paint off the nozzle with a not-too-hard brush.
But just spraying hot water through the gun will gradually lead to a clogged draw tube and kind of rolled-up paint-skin "pearls" stuck just behind the nozzle. Once in a while you need to undo the nut that holds the draw tube and brush the tube vigorously from both ends. If you have paint stuck in there from too many inadequate cleaning attempts it may take a wire brush to do the job. I keep this kit around for that. The tiniest brush in the kit is also useful for cleaning the inside port of the nozzle.http://www.amazon.com/Pro-SPRAY-CLEANING-KIT-HVLP-Gravity-Detail-Airbrush/dp/B001MSWX3G/ref=sr_1_3?ie=UTF8&qid=1326322841&sr=8-3
The Fuji really is a nice machine, no question. I do a lot of coating and found it difficult to get really consistent results from the Wagners. The Wagner would always do an OK job, but I had trouble getting the same amount of paint flow from session to session. Above all else the Fuji has given me near perfect consistency. I can dial out the needle 1.75 turns and it will always give me exactly the same paint flow over the same period of time. I spray to an 84 count metronome beat, and 1 foot per click and 4 inches advance between passes always gives me EXACTLY the same result, with no surprises. Also the Fuji filters are big and far away from the paint overspray, but the tiny Wagner filters are right there in the haze and they need a lot of cleaning attention to get consistent results.