Still deciding on a MD to start out with......been doing the research and Kellyco is offering the pro 250 package with 2 extra coils, one being 9 x 12" PROformance Search Coil. With the purchase of this package they are offering the 10x14" EXcelerator II Search Coil for $99. My question is is the EXcelerator that much better than the PROformance coil to justify the purchase of the EXcelerator? Thank you for all the knowledge I have gained from just reading this board and Happy Thanksgiving