I just rec'd my new mxt as an update to my old tried and true 6000DI/Pro. Tested it at local park where I still consistantly can pull out coins with the 6000, so I used the park as a 'control' to see how the MXT stacked up. Spent an hour or so with the 5.3 " coin and pulled up 3 dimes , one nickle and 4 zinc pennies. Second day switched to the 9.5 " coil and hunted same area for about an hour also...pulled 4 dimes , 4 more zincs and a quarter...both days the finds were 4-6"+ deep and likely missed by my 6000. I think I've already figured out the answer to my question...but...here is my observation: the 5.3 coil cover way less ground but is much more stable and VDI much more consistant and reliable read...the 9.5" chattered much more, even in in what I thought were low trash areas and difficult to use with confidence...Can I assume that this is the case and that I should stick with the smaller coil most of the time?? ...and if that is so would'nt you think that the 5.3 would be the standard issue and the 9.5 sold as an 'accessory' item?...I 'd appreciate MXT user's feedback...thanks!