Grande,
I don't think you 'need' hydro, but I would not own a manual shift without a shuttle. This helped me decide between the TC33D and the TC35. I could get the larger tractor (TC35) with shuttle for about $500 less than the TC33D which has hydro. The TC35 has more loader capacity and ability to use larger implements. (BTW, the TC33, non-D, doesn't have shuttle so you have to reach down between your legs and navigate the 'H' pattern to shift from forward to reverse.)
So, to sum up, get a gear tranny with shuttle. Without shuttle, it is too difficult to reach down all the time to shift from for. to rev. With shuttle, the shifter for fwd/rev is usually up near the steering wheel and is easy to just slide back and forth.
If you can't find the tractor you want with shuttle then go HST.
I don't think you 'need' hydro, but I would not own a manual shift without a shuttle. This helped me decide between the TC33D and the TC35. I could get the larger tractor (TC35) with shuttle for about $500 less than the TC33D which has hydro. The TC35 has more loader capacity and ability to use larger implements. (BTW, the TC33, non-D, doesn't have shuttle so you have to reach down between your legs and navigate the 'H' pattern to shift from forward to reverse.)
So, to sum up, get a gear tranny with shuttle. Without shuttle, it is too difficult to reach down all the time to shift from for. to rev. With shuttle, the shifter for fwd/rev is usually up near the steering wheel and is easy to just slide back and forth.
If you can't find the tractor you want with shuttle then go HST.