Thanks for all the replies/opinions! I went with X4D...my FF is a DSI model and doesn't mark my DR weights often enough. I fished this morning and played with the settings on both 455/800 frequencies. Sometimes it will for a short time. I believe the cone is too narrow. Thus, the D part will be useful. BTW~Northwoods wholesale outlet is $100 cheaper than all the other places on the internet. You have to call to get a price. I paid $649. An absolute steal! They quoted me $529 on the X4.