I don't own a 50g but I do have a 35s, a 48gx, a 32s II, and an 11c. I started with the 11c in 1984 and have acquired the others along the way.
I have used the 48gx the most of them all. The 35s is my most recent. My favorite is the 48gx. This is not due to the many advanced features (that I rarely use) but due to the way the stack operates and that I can see four levels of the stack at once. I have also used the unit abilities quite a lot.
I bought the 35s because it is a return to what HP calculators used to be and because it has a two line display. However, the stack works the same as on my 11c and 32s II (i.e. entering a value places that value in two registers initially).
The 35s is a quality instrument.
If it was me and I could afford the 50g, I would buy it. However, I'd keep something like the 32s II / 35s around for exams that ban the 48/49/50 series.
Gary