There really isn't a good "all around" one. There are some lines of liquid ferts like Pfertz and the Flourish line (NPK and micros). I use dry fertilizers from Rex Grigg. They are potassium nitrate, potassium phosphate, potassium sulfate and Plantex CSM+B. These are the thre macronutrients (NPK) and the mix of micronutrients (CSM+B).
Most would say that dry ferts are less expensive, due to the fact that liquid ferts are mostly just watered down dry ferts. For ease of use liquid would probably be easier to use, just measure and dump. Whereas with the dry ferts, you can just measure and dump, or prepare a liquid solution depending on what kind of dosing method you would use, EI or PPS.
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