You have the correct website. Click radio equipment, click servo, click info. The torque, size, weight, and features are displayed. I use the D200 servos for my 1/2a planes and for .40 size throttle or dual servo ailerons. The D60s are used in my 1/2a planes, electrics and for throttles. The D4000 is a good standard servo. I find it hard to find the features like ball bearings, high torque specs and price that compare.
I have the most standard servos from HiTec and have never had any complaints.