Until someone pipes in - I am sure you will get positive reviews on both. Heck - some members actually think Obama is a great President while other's think he is destroying the USA - it is all subjective. So, until you start getting recommendations - you might consider reading about the Garrett GTAx 550™ on the SubForum: Garrett and the Minelab X-TERRA 305™ on SubForum: Minelab.