we have a t8300 and love it.  Just traded a t9390 on a t8390.  They could not get the t9 to run smooth for us.  Tried everything, cab had a continuous vibration in it. t8390 is coming with front suspension as our t8 doesnt have it.  But the t300 is our planter and drill tractor and the 390 will be working ground.  I find the transmissions really smooth .  Deluxe cab is a must.  Dont buy a tractor without it and dont buy one without cab suspension.