which coils for xterra70

[GTI2500]

I'm planing to buy a xterra70 this week.
I'm thinking of getting the 9" 3k with it instead of the 9" 7.5k. I will mostly use it for coins. Then for my general coil get the 10" 7.5k. I know a place on lake Huron where I know there are goodies. I've detected it many times with my Garrett 2500 and have never found anything worth keeping. I'm thinking the 10" coil may get it done.
I'll also get the 6" 7.5k.
Good idea on the coil choices?
What think ye??

thank you
larry b

 

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[X-Terra70_TreasureHunter]

Larry at the start get the

#1....10.5" DD 7.5kHz coil for General hunting
#2.....6" Concentric 7.5kHz coil for trashy areas
#3.....and if your going todo Gold Prospecting get the 5X10" DD 18.75kHz coil