When I traded my
L3430 and BH90, the dealer said I could keep the BH90 since it would fit the
L6060 I bought. I imagine the same would be true for your
L4760. From what I've seen, the BH90 and BH92 are interchangeable in most cases. IMO, you never run out of work for a backhoe.
In my case, the dealer gave me a good price on the
L6060 / BH92 combo so I traded the BH90. I much prefer the "banana" style boom on the BH92.
Anyway, I'm sure you're going to love the
L4760. You can always add a hoe later if you find the need.