I agree mostly with CaseFan. I would only add that bucket breakout is typically dictated by the size of the tilt cylinder and the mechanical advantage afforded by the load arm design and tilt cylinder location. If you notice that tilt cylinders that are more vertical in their position tend to have less breakout force, this positioning offers less mechanical advantage than does a tilt cylinder that is less vertical. Some of that mechanical advantage or lack their of can be overcome with larger cylinders and more psi. Also the breakout forces can be deceiving, how that number is measured is important. Most of those numbers are gained with a short radius bucket, sometimes referred to as a foundry bucket. However most machines are bought with a low profile/extended lip bucket. These buckets offer much better view to the cutting edge and greater capacity, but do to the long radius, they reduce bucket breakout. I have found it is really important to run them with the bucket you most commonly use to see what kind of breakout the machine has in your conditions. I run low profile extended lip 84" Virnig HD dirt buckets, and my personal requirement is that I can hit a pile of gravel and the machine can easily break the bucket out of the pile without backing up.
If you need the lift, you wont be disappointed in the breakout of the V2. Its a beast, but demo both the R and V and see for yourself what machine fits your operation.