I have been using the stock 12" with my MXT for both beach and tot/parks. On the beach the 12 is great, but in other trashy areas or near steel poles or fences I need a better coil with good penetration and better close in work. Have been reading the remarks on the 6x10 Eclipse by white's and the newer 8.6 sef model. Sounds like the 8x6 has better penetration than the other. Every time the 6x10 is mentioned it is linked to prospecting for gold. I am leaning on the 6x10 since it has such a good track record, but much is not reported on the other. Most of my detecting is here in Florida at the beach or in parks/schools. Also should I get the rod that connects to the coil for easy swap out. How do you mostly change out a coil? Thanks, only 4 mos. into the hobby. My wife thinks it is becoming a obsession. (she is right). Have found about 4 rings so far. Marty