Nah Kulverstukas, it doesn't need high-end specs. I tried out an alpha version of Ubuntu Phone for my 2 year old Galaxy SL (1ghz singlecore sgx530 gpu) and it works, but not smoothly yet (no HW acceleration+RIL +no some other shit). I'm sure it will run as flawless as current CM10 builds run on the Galaxy S2, as Android is the base for Ubuntu Phone OS which I said earlier. The Galaxy S2, even though now old, is still a very powerful device so don't worry pune