Arch will make a better foundation distro IMO.
But I like Arch too. I just switched away from it because I got tired of things breaking if I wasn't religiously upgrading.
I found that upgrading Ubuntu/Debian to the next release always screwed everything up as basically all the packages changed. Heck fedora couldn't even update to the next release until fed up came out.
[1] my wifi chip took minutes to initialize due to proprietary blob issues.
After trying Arch and running into too many irritating bugs that I didn't have the patience to fix I gave up on it.
Plus this didn't give me a good impression of the community's professionalism either: http://news.softpedia.com/news/Manjaro-Devs-Fix-Embarrassing...
That said, I don't feel the idea of the Arch community revolves around professionalism; it is really an amateur thing, in the positive sense.