Hi JFL
I haven't been on this forum for awhile. I have the 12.5, 18 and now the 5 inch coil. I have made some darn good finds with these coils! I have now found two caches on the same farm with the 18 in and the 5 inch has been very impressive. I think the 5 is very sensitive and has superb seperation. I have been out 3 times wiht it in a week and its proven itself to me. If you want to do some deep digging then by all means get the 18. I found a standing liberty quarter in my own yard over 20 inches when I first got the coil last year! I will say they are well made coils and would recommend them to anyone. I think sunray and coiltek are also fine coils but until they make an 18 I can't compare that one but the 5 of sunrays is also a great coil but I've had better results with the EXcelerator. I think all coils will give different results in all parts of the country. What works great for me in Indiana may not be worth a *%$=# in california. Its just my opinion and I'm not knocking anyones coils they are all good as far as my results. Price can always be a factor in some peoples decision. Myself I buy and try them all and use what I like and have best results with and sell what I don't use.