Check out Buzzrack too. They are a little better priced then Thule, are very reliable and reasonably easy to mount and use. I have been using the quattro for over 8 yrs now with no major issues.
I use PVM bars on training rides where I can stop / slow down to eat them. However, I use GU gels when doing events / races (<4hrs) as you can consume these quickly, on the go without stopping or having to chew excessively (especially if your a bit winded from pushing hard...).
