If you really only want to to tip your toe into the modular waters, there is the Tiptop Audio Happy Ending Kit. 84hp, you can mount it into a rack, a uZeus power-module with 1000mA is included. The company-thou-shalt-not-name with the big B offers a similar solution for a few € less.
Or, and for me that's the way to go, build your own case. There's dozens of videos on YouTube with quite detailed instructions, and if you're not completely useless with a jigsaw, it's a cost-effective and fun alternative to prebuilt solutions.