Hi All I'm new to the forum and have been reading through the sites, all you guys sound like one big family, very enjoyable reading, to my inquiry I just purchased used a GTI 2000 and realize that time on my part will be needed to fully utilize the units capabilities, I have seen very Little information on this particular detector, how much different is it from the GTI 2500? Is it worth upgrading the chip and circuit board to the 2500 specs? I am still a novice when it comes to detecting but am a quick learner. Are there any local groups in Westchester County NY that I can perhaps detect with? and garner pointers and in-site into the detectors capabilities and proper usage. My ultimate goal and intention is searching beaches in the Caribbean for jewelry coins on both the sand and perhaps waist high water, I may also be interested in any local classes that May be offered if anyone has knowledge of any. Thanks for any in-site and looking forward to hearing from a few of you, Johnny O