Congrats on the new bile, looks good. I like the colors.

Last year I flipped my stem as soon as I got my new bike and had tons of back trouble. I flipped it back after a while and the problems went away. I have it flipped again and all is fine. Honestly for casual riding I dont' see any reason to flip it anyway, except for looks :-)

Don't make any adjustments until you have miles under your belt and see what you need then, if after a while your buttom still hurts, you may need to check into a new saddle.

I like looking at my average mph too. People here go into fits when someone brings up average mph so don't mention it too often, but I still like looking at mine :-)

Miles, miles, miles....