Ive been wondering why people say the ace has a slow recovery time. When you get used to it , there is nothing slow about it. Ive owned whites classics 2 and 3 , tesoro silver sabre umax and bandido 2 umax and used them for years. After having an ace 250 for 3 to 4 months I am covering ground twice as fast as with the others with atleast twice as many finds. The silver umax does seem more sensitive and gets a little more depth , but unless the term "slow recovery time" is a technical term referring to electronic retune or something else I dont get it. I believe the tesoro to be better in some ways but identification of a target gets really sloppy sometimes especially with the "iffy" signals and having a machine that measures the conductivity of an item and gives you a readout of the probable target can actually help speed things up , even if you are experienced. Speed is a relative term , the better you get at using your machine , no matter what kind it is , the faster you and it will be.
But, in choosing which detector buy you really cant go wrong with any of them to start out with though I would stay away from anything generic or foreign made , and those american made companies that are BEST known for making cheap detectors so much that you can sometimes even find them in places like wal mart. I recommend one with a visual target display but its not necessary and you can actually learn a lot more about how detectors work by using detectors that dont have a display , the experience gained by learning subtle sound differences is a positive thing. In the end though its all about finding more goodies , especially when just starting out that way you dont get frustrated and give up so easily before you get the experience under your belt. Everybody has their preferences and what works for some may not work so good for others but sticking with the whites, garrett, tesoro or fisher brands should do well for you no matter which one you choose.