Hello,
I happen to have a Classic 5ID. I haven't used it in awhile, in fact, I gave it to a guy, to use. I also have an M6. I am now awaiting the arrival of an ACE250. The one thing I can say, if you want a NO programs, two knob detector, with no ability to change out coils, then the 5ID is for you. I don't know, cause I don't have it yet, but for the money, and the comments of folks on this forum about the 250, I believe the 250 will be much more fun, and a performer to boot.. I will say target pinpointing is great on both the 5ID and the M6. But first you gotta find it. I have a cousin that has a Minelab SE and he said about the Garrett, "Those Ace 250's are good little machine, I think you'll like it" Off track a bit, you won't need a Swingy Thingy to handle the 250... you will be able to hunt all day, and enjoy the evening.
Bill