I think the machine is good enough. Portable and Fast. A little short on storage space, but if you don't hog it by huge files or photos then that is not a problem.
Also, I will add the following to the list of apps you should have:
- Flycut (Clipboard Manager)
- GasMask (host file editor)
- Sequel Pro (if you're using MySQL)
- Dotfiles by Mathias Bynens (https://github.com/mathiasbynens/dotfiles)
- Any of your favorite task/to-do list manager.
Feel free to add more.