Plowboy,
Don't know about a D20, but if you stay the same size as your IH TD340, look for a IH 500 Series C or E or a JD 350. The JD 450 is the next size up and so is the IH 100 Series C or E. The IH 100C and E have wet steering clutch and brake systems and a full powershift/torque converter transmsission, and are very reliable. It's the only loader in it's size class with these features. Many were sold with 4 in 1 buckets and rippers on the back.