digitrich, your buddy finds a lot because he has learned his machine. Someone who really knows a machine with half the capability of the SE will do very well because at least half of this is the art of knowing when to dig.
I am still wrestling with learning the sounds of the SE Pro. I hunted a White's XLT for ten years, and found a lot of good things. I also have not yet found a capability on the SE that gives me the sounds of the discrimination processing without cutting any out. Will all metal do this? The XLT had an autio pass through where the sounds of silver came through very well when mixed with other targets but all sounds were passed through in this mode and after a half hour your mind was mush. Still a lot of good finds in trash this way.
I moved from the XLT for two reasons. One, I felt the Minelab had demonstrated better depth than the XLT for those who knew their machines, and Two, I figured that 10 years of technology improvement should give me something.
I am disappointed in the 'lack of separation' between the wheat pennies and silver. If the Minelab engineers merely assigned random FE and CO numbers rather than using a true conductivity and FE scale, then they should have spread it out (something I hear the ETRAX does but I haven't seen one.) I also find it frustrating to dig so deep into hard ground, especially for what often turns out to be false highs from rusted iron. I was counting on the iron mask to be more effective than I have found it so far.
I am also beginning to believe, however, that the desert southwest soil is partly to blame for not being able to really crank up the power of the SE in my area... I guess I could have gone to a Bounty Hunter.