Water cooled is a lot quieter and the setup isn't particularly difficult (to be honest, though not recommended, short runs can be done without cooling). Are you just looking for a spindle or an inverter package as well? (to give you the three phase supply required by the spindle and the variable speed control). I'm guessing the latter - in which case the Huanyang brand is highly respected. To some extent the supply is subject to luck - I have heard reports of people buying a spindle believing it to be a 4 bearing model and on examination finding it otherwise (can't recall if 2 or 3 bearing).

Though I've never dealt with them knowingly, BST Automation on Aliexpress have a very good reputation.