First of all, you sound very realistic.
Your speeds would be just about correct for someone your experience and size. You even have the second serve speed figured out nicely.
Would be nice to see a vid of your serves.
You can watch servers and motions of guys your height, and try to copy somewhat. I like Hewitt's motion....he gets 125 out of his slight, 145lbs. 5'9.5" frame.
Watch the vids and have a friend critique with you while watching, then watch your vids and figure out what you lack doing.....