LJ - congrats! that's a nice brush.. I have one myself that was replaced by my new Iwata..
As far as storage if you don't use it frequently, some type of cloth bag or a small box it fits in should be fine. My Iwata and Badger 175 stay on the airbrush holder but I use mine everyday and clean them every day. Oh yeah and keep the protective cap on at all times when not spraying, the needle is exposed on that model and if you drop it you risk having to get a new one. Which if you have a Michaels Arts and Crafts chain store near you, can be gotten there without having to go online for it. (They sell that airbrush there, for a lot more than you paid for yours! But the needles are reasonable, about $7 or so)
That's the only two places that need lube. Just put a drop on the needle and smear it into an even light film is all that is needed. Otherwise you might gunk up the needle bearing if you put too much. A drop or two into the trigger mechanism and you're ready to go! With acrylics I lube the needle right before I start spraying, and if spraying for long periods about every 3rd color cup I do it again after cleaning the needle.
I didnt like the dimpled thing either at first but I got used to it. I don't know about a round one.. you might look on Badgers site as mentioned. You can also use it without the rubber piece if it is more comfortable. It will probably grow on you if you try it a few times. If it keeps coming off, a little silicone caulking (you can get small squeeze tubes at Wal Mart and such) on the metal then sticking the rubber piece on and allowing 30 or so minutes to dry will help keep it on.
Congrats again!! Can't wait to hear how you like it!