I found, after using both the F5 & the O8 that I really like the O8 better. Here's why -
The modulated audio on the O8 is very helpful at conveying useful information such as target depth.
The nickel/pull tab window on the F5 was a big problem for coin shooting in trashy parks. Unfortunately the F5 had a hard time telling between nickels and pull tabs, and if you wanted to dig nickels, you ended up having to dig both segments (nickels consistently hit in the pull tab segment, and pull tabs in the nickel segment). When combined this is a large segment, ranging from 30-42 on the TID.
Actually I just checked the latest F5 manual online pdf and noticed that they NOW including pull tabs in the nickel segment:
30-32 Nickel, Old style pull tab
36-42 Pull-Tab (new style), Ring Pull
I do really like the F5 user interface, and although the Omega is VERY simple to operate, I think the F5 has a better user interface and display, even if it's a little more complicated (has a threshold adjustment).
I've taken both the F5 and O8 to the same areas to hunt, and never found anything over 6" with the F5, whereas I've made several 7-8" coin finds with the O8. In fairness both machines were not tested side by side, so I cannot say if my F5 would've hit them, but I do have my doubts as I put a ton of time in on the F5 and never made deep coin finds, but I was making them in short order with the O8. I also suspect the enhanced audio has something to do with finding the deeper coins on the O8 vs the F5. They F5 may well see them, but if it reports back an unintelligible audio signal, you may not investigate it.
Also worthy of note is that the Omega is at least a year newer then the F5 and although they share a similar hardware platform, the Omega is newer, and better refined. If you like Windows XP vs Windows 7, you may like the F5 better
