I went into the router vs spindle thing thinking I could buy 8 routers for the cost of a spindle, but now after burning up 3 routers in less than a year. I just ordered a 1.5Kw water cooled spindle. The spindle, VFD, mounting bracket, and water pump set me back about $750. I went with a guy out of Pennsylvania (www.ugracnc.com
) as opposed to China. I'm sure the spindle comes from China, but at lease there is someone who speaks some English if I have a problem. You can get the setup out of China for about $500 or so depending on shipping charges. And you've got a very complex situation for returns/warranty/support.
I think the noise factor will be nice, but less vibration means more precision in the tip of the bit for small carving/engraving is what I'm after. The water cooling should help longevity. I put a laser pointer thermometer on my routers and they were all running 135 deg F on very light duty work and more like 140+ on deeper cuttings. Thats external temps too. The bearing had to be much worse. Hence the failures.