If you're looking for the best, and intend to use both a lot, here's what I'd recommend:
For a blender, a Vitamix or a Blendtec or K-Tec are the best (most other ones don't have the power to be able to blend greens and fibrous fruits and veggies well enough). I have a Vitamix, and use it daily at least once. (caveat: also buy a pair of sound-damping earmuffs or ear plugs to use with these: with power comes noise! I've been wearing my earmuffs--the sound-damping kind, not the winter-wear kind!---when I use my Vitamix, to prevent hearing damage).
For a juicer, a Green Star or Champion are better choices than centrifugal juicers, as they squeeze more juice from the pulp (the Green Star has the driest pulp, meaning it gets the most juice from your produce, but it takes more work to juice carrots with it. It also has magnets inside that do something to the juice that make it last longer. You can keep the juice for a couple of days in the fridge, whereas most juice has to be drunk ASAP after making). Another advantage to this type of juicer is that you can make nut butters, or banana/frozen fruit sorbets/ice creams, or bread dough by runninig ingredients throught the juicer with the blank screen in.
The disadvantage is speed. The Green Star is slower than the Champion, and both are slower than centrifugal juicers (but that's because they treat the produce with more care and get out more juice).
Centrifugal juicers (like Breville, or Acme, or Jack Lalanne's) not only don't remove as much of the juice from the pulp, they also make juice that oxidizes quite quickly.
The Vitamix/Blendtec and Green Star/Champion are pricey, but I think you definitely get what you pay for with them.