DMO footpegs are, indeed, a no-brainer. Too inexpensive not to go for
Cycleracks for the rear aren't quite as thrifty, but hella useful. Money you won't regret spending.
A tach? Check out Trailtech Vapor if you must, although you might be overestimating the importance of a tachometer. For about $200 less you can get a TTO thermometer from Trailtech that will help you keep out of the redzone just fine with 1 metric and a way easier install. I drove a standard car without a tach for 8 years, and after 100K miles or so I totally got used to it.
If you're riding off-road much at all, a better front tire and an aftermarket skid plate should be at the top of your list. I have a 244 in 5.10 up front and the TCI Skid. I've heard good things about the 241 as well, but there are lots of options. Ricochet makes a Skid plate with an easier install, but even though the TCI is a ridiculous PITA to install and a regular PITA at every oil change the protection it offers is unparalleled.
Congrats on the new TW, I went that route myself and never looked back! The only real must-have is time in the saddle, but with a new bike in the stable I'm sure I don't have to tell YOU that!