Welcome to the Explorer world

First off I have hunted with the CZ line (3&5) and yes they work but, man if the 7 is as hot on nails at an angle like the 3 and 5 where boy are you in suprise in a good way.
As far as comparing the CZ line to the EX line you really in all due respect really cannot compare them in the ability to distinguish items and i.m.p.o depth.
First off the CZ line operates on 2 freqeuncies usually 5and15khz as the EX line uses 28 and if I can remember like from 5 up to 100khz. That in itself is a huge difference in helping to determine its conductivity and ferrous content which helps to determine for you (after learning) what most likely the target it is. (Someone please chime in as the number of possibilties offered I cannot remember but, it is a bunch).
You can choose the analog screen using the F&C numbers or the Smartscreen not just a needle sweeping to some coin picture.
The weight of the EX is about 1lb heavier but, unless you have bad shoulders or back that should not be a problem.
There are just so many things the EX line offers it would take me hours to cover.
Type in Learn, Saved Custom Programs that will just give you a super small glimpse of the things you will get a chance to learn that can benefit you over your existing machine.
Since it is winter and it sounds like you will not be hunting much so, ask questions and read the manual Front to Back then do it again.
If your going to make the change read, read and read the forums but go easy on yourself your time invested in learning will pay off bigtime.
Best of Luck on your descision
