I originally got my 1026R with the independent lift but switched back to the mechanical. The dealer and Deere were kind enough to let me swap when we figured out how it worked on the 1026R. On the 2305 (and, as I understand, the other 2k tractors) the mechanical lift had to be hooked and unhooked when the 3pt arms came on/off and I was tired of that so I got the hydro lift this time. I also got the 3rd SCV, thinking that I'd use it for the mower and then for other handy things.
The 3rd SCV is fine, but not when combined with the PB and backhoe. It conflicted with the PB QD locations and PB plumbing. In the end the only way to use it would have required me to bungie the SCV to use the backhoe... So that was sent back. There was (and still is to my knowledge) no diverter option actually available, so that left the hose swap that you all have been writing about. It was a pain in the rear.
Additionally the mechanical lift on the 1026R doesn't have to come on/off with the 3pt, making it much easier to work with than previous models. One thing to know about the 3pt, the full range of motion for the mower is within the upper third of the full 3pt range. In practice this means you don't have to worry about dragging a 3pt implement while mowing if you have it on the 3pt. You won't have the 3pt lever below 2/3 of the way up.
All in all... I've had both, and I prefer the mechanical on several counts.