A lot of good advice here and I agree do not buy the usually worthless warranty. If you do they control all repairs when problems arise... and they will. If you self insure by setting aside money instead of giving it to a third party you decide when and where any repairs get done and they will be working for YOU! This is especially important when you are out on the road vs at home... you do plan to be out on the road, right?
There are lots of stories on the Forums about folks who have been waiting for months for dealer/warranty repairs to be completed. If you are not locked in by any warranty, extended or standard you will be free to take your rig elsewhere.
This method does require the discipline to a actually set aside some additional monies every month in order to grow the fund. Interest rates are currently a joke, you will be lucky to get one quarter of a percent but set the money aside anyway. Stay on top of preventative maintenance and read any warranty that a new unit comes with very carefully so you will know what is {not much} and what is not actually covered.
Good luck.
:C