as far as whether or not to buy digital......WHat radio are you using? is it AM? if so are you planning on upgrading to FM anytime soon?.....If not then don't waste your money on Digital...just get a nice set of Analog servos....I hate the Hi-tec line except the 645MG and 625MG...those are the only Hi-tecs I haven't had any issues with......I've had 3 of their digitals be bad right out of the box so I'll be leaving them onthe shelf from now on.....