About the loss of power due to having an HST...
I have written on this before but feel inclined to repeat myself. Maybe it is just Kubota's SUPERIOR engineering...
B-U-T... My tractor is rated for 39.5 HP at the PTO. Now, if I had bought the more efficient GEARED tranny on the same model tractor I would have had 40 HP at the PTO. OOOOOOH I'm being robbed of 1/2 of a HP!!!
I don't think that short of a sensitive dyno test you could tell the difference. I certainly don't think an operator is going to perceive 1 1/4 % loss of power. If other brands of tractors lose a significantly greater percentage of their power in the hydraulics then that is a statement on their design.
I admit that I do not know the power loss of other makes of HST but truly doubt that any NAME BRANDS are particularly inferior to Kubota in power transmission.
MYTH BUSTED - - - HST is not a big loss of power
As to reliability... Maybe I'm just luckier than most (nothing else tends to support that hypothesis) but I have mistreated my Kubota with a vengence (just thrash around on it like a madman) and the HST has NEVER required anything but filters and fluids.
About the idea that it doesn't make a difference in manuvering, especially tight manuvering... I can heel and toe with the best of them and double clutch too. I can drive a non synchro tranny pretty grind free B-U-T... I have no illusions about any manual tranny tractor, even a shuttle shift or automatic clutch model being as easy to use in close in manuvering. I'm not disagreeing with any previous poster's comments about their manual shifting abilities and speeds. I do claim that the HST is easier under all manuvering conditions and will let virtually ANYONE perforn at or above the level of the best manual tranny user with minimal training and a lot less actual work.
If you do not anticipate tractor use with a FEL or any mowing with obstacles and mostly are into row cropping or dragging implements through the dirt for hours on end wiith very few reversals in direction, then by all means the standard gear tranny is the best fit. Most folks would agree that it would outlive the HST in that service and be cheaper to maintain.
So what if you save a few bucks in purchase price and another few bucks in lifetime maint costs if you give up a lot of convenience and capability. You can regret at your leisure what you decided in haste. You will have hundreds if not thousands of hours of seat time over the expected life time of your tractor to wish you'd opted for a better fit, WHATEVER THAT IS if you don't choose what you want/need instead of what you can get by with.
Pat