I only have experience with the Compadre, also with the 8" coil, and I really like it. I'm guessing the Garrett and Fisher are each company's 'entry-level' machine? The Compadre may be Tesoro's enrty-level machine, but it is not a toy. I have used mine in wet saltwater, at insanely trashy parks, and everywhere in between, and it finds stuff everywhere! I think the trouble with the typical entry-level machine is that they leave a lot to be desired, and are designed to be out-grown quickly. The Tesoro is something that still has a place with even very experienced detectorists.
There is only one problem with the Tesoro. With the lifetime warranty, you'll never see a need to sell it.

It's inexpensive enough where resale isn't in way up there, and since it will always be repaired, why would you ever need to get rid of it?
So, IMO, the Tesoro would be the best $160 spent on a new detector.