Id say the Sun Ray inline.... if there is one for you detector. Good depth, you can switch off the main coil so you dont get EMI like a hand held, you get normal tones and TID, you dont have to find a place to put them since they are attached, you dont put them down and loose them, and they are water proof and made durable. Down side.. little more weight to carry, sometimes pinpointing the target takes practice, if you are in pinpoint and switch coils.... you get a blast of noise, you have to remember to switch back to the standard coil... or you might detect a good while before you remember it, you have to remember if you are using disc that targets disappear once you remove dirt on deep targets that might have been disc out, and lastly ..... cost. Garrett makes a good hand held as does detector pro if you decide to go that route. They both get great depth.. create EMI so you may have to move your detector, and i dont know about you, but i tend to leave things like digging tools and hand helds. Sometimes you find them sometimes you dont. They let you know something is in the hole... you just dont know what until you dig it. I like the Inline because a lot of those targets close to the surface that it tells me are coins i can just pop out. Deep ones, dig a few inches and i can tell another 3 inches down what i have without digging a bigger hole. Cant do that with handhelds .... you have to dig the target.
Dew