Trusty 32SII dying - should I get the 35S or 50g?

[Derek W]

I have both in my work desk drawer (as well as about a dozen other calculators) and I use the 35s far more than the 50g. Somehow I've never climbed far enough up the learning curve of the 50g.
As a practical engineer most of the 35s bugs don't affect me, the only two that annoy me occasionally are:
1) negative exponents disappearing off the right side of the display in floating point - I virtually never need more than 5 significant figures in my work, and I'd rather lose the last decimal place and keep the exponent in view
2) programmed equations being lost due to battery problems (maybe a couple of times in nearly 10 years) which means typing them in again
Mine is an early one dating from around 2007 (from memory) and the keyboard has been fine.