All fbs machines are the only true coin machine on the market. Lots of middle of the road machines out there, good at alot of things. But FBS anything is still king in my opinion for deep old coins.
As for the rank,I prefer the explorer SE over all of them.Personal preference,sounds are better than etrac and I never saw a find I made with the etrac that the SE wouldn't have found.
I don't swing slow, and I don't whip the coil either. I count to 3 from side to side swing with all my machines,and the fbs don't struggle imo.
I like the safari, but I would also put any of the explorer models in front of it in a lineup. Just because they're more adjustment to be made. But the safari will find anything the explorer will ,I'm sure.
Buyers market for fbs, and it won't be that way for long I don't think. Newer models have come and gone, but fbs is always in play and demand. I had a explorer 2 up at a dirt cheap price, but for whatever reason it didn't sell. No problem,I'm glad I pulled it, just the nicest tones and as deep or deeper than anything on the market. Built to last,FBS