I would choose the following, in order of preference:
1. Vista HCx
2. Legend HCx
3. 60CSx
If you're gonna be in BFE, IMHO battery life is most important. The Vista & Legend HCx win hands down over the 60CSx battery life. Accuracy wise & ability to hold a lock, all 3 are about the same, although the 60CSx may have a slight edge due to its external antenna. Weight & size wise, its a no-brainer, Vista & Legend HCx are the clear choices. Build quality, 60CSx seems better. All 3 units are waterproof to 1m (IPX7).
I've used all 3 units side by side & I feel the Vista & Legend HCx screens are much clearer & brighter than the 60CSx. The 60 seems to be using a previous generation TFT screen.
Have a great time in BFE