I have the 2500 and the ACE 250. I have used them side by side on several occasions and find the following differences. With the ACE I find myself digging everything because it doesn't have the imaging feature. Therefore I dig a lot more trash with the ACE. With the 2500 and the imaging feature I can eliminate a lot of targets that I know from experience is trash. As far as a pure coin shooter, the ACE is almost magic. I can find coin after coin after coin with very little effort due to it's light weight. The 2500 will seek out deeper targets and is a lot slower to operate because you have to make some decisions based on your ability to communicate with the machine and it is a lot heavier although it balances really well with the standard coil. Although I have the Stinger coil for both detectors I use it almost exclusively with the ACE. I use it for going around the edge of metal structures such as metal buildings and fences. It also does very well checking the edging of concrete slabs or sidewalks that have rebars. I find a lot of quarters along these edges. Retire my 2500? No way, it's old reliable and I would feel naked without it! If it does everything the new 1350 does and then some, why would I need the 1350? Although I use Garrett detectors exclusively I do feel they are getting behind in technology and need to do some research and engineering, especially in the field of multi frequency technology. Whether there's any advantage to it or not, that's what makes the Whites and Mine lab so attractive to buyers of top line detectors. JIM