I also want to use Qt UI for my Project. Its the best and most popular I'm told. Wrong?
"Best" is very subjective, all I'll say on this subjet is : "I like it"
Lastly i would chose another if it has a latest g++ version than 4.6.3 preinstalled. Fedora 17 has 4.7
My only fear is that with a most state of the art g++ will have probs with classic code.
I saw many who want to backwards their gcc versions to 4.4 4.3 and so.
If testing more than one g++ version is a priority, I recommend Gentoo. It takes a while to set up, but the ability to have multiple gcc versions installed at once is really great; an the documnatation is great. Installing with full debug packages is also a piece of cake (in case you find a bug in Qt).
Now, take this with a grain of salt a) because I'm not a hardcore programmer, b) because with gentoo system administration will become a must. I'll just say that it saved my but this semester : my gentoo was at gcc-4.6, at school we're still on gcc-4.4. the older version being only one command away (without changing the default version) was priceless.