Hi... I'm new to metal detecting and this forum. I had been shopping for a detector and had narrowed it down to a White's M6, Ace 250 and Ace 350. The dealer explained that the M6 was in another league ... but in the end, being new to the hobby, I just didn't want to spend the extra money ($699) for the M6 at this time. My reason for buying the Ace 350 @ $297 over the Ace 250 @ $219 was that I got the larger coil and volume adjusting headphones for the extra bucks. I just thought it was a better deal. Now lets see if I can find anything... ;-)