If you were to compare the White's Prizm IV against the White's M6 for coinshooting only, is the M6 really worth the extra $200? (as far as ability to sniff out good coins and go deep)
Tony is right and though the Prizm works well in most areas I'm on hilly ground thats like detecting on a layer cake and the Prizm struggles at times while the MXT/M6/XLT have no problems what-so-ever.