I prefer a mechanical keyboard myself (although with Cherry Blues). The Apple Extended Keyboard 2 (with Alps switches) was pretty good too.
I have a 48G and a 50G. I bought the 50G after the 48G took a swan dive out of a third story window. It survived (I doubt the 50G would). But I didn't want to chance losing it. The 48G stays at home and the 50G stays at work now.
Your 48SX is still better. The 50G is certainly a capable calculator, but it's got a lot to live up to. The only calculator ever made that could claim to be better than the HP 48S/SX/G/GX was the HP 15C, and even that is comparing RPN apples to RPN oranges.
(I really mean milk it for all the cash they can get from the suckers. I was cynical to begin with, but I'm a lot more jaded after watching what J.J. Abrams did to Star Trek).
For variety, here's an example involving a hairstylist.
Wasn't "No taxation without representation" coined in (what became) the Commonwealth?
Yes, but where is that money going?
Winston Brooks, superintendent for Albuquerque Public Schools, makes $250k a year as of 2013. APS teachers averaged closer to $43k last year. According to CNN Money the poverty rate (lowest 15% of income) in 2013 was on the order of $51k nationwide.
Um, according to the article you cited, $51K was the median household income in the US in 2013, not the poverty line. FTA: "Those making $23,492 a year for a family of four, or $11,720 for an individual were considered to be living in poverty."
Film at 11.
Good for the goose and all.
There is a vested interest in driving down wages for those few jobs that remain however.
Now the batteries on the other hand.... Batteries don't hold charge very well in the cold. It's been one of the two big problems for electric cars since the 19th century.
Who needs a hobby that'll bring the cops, battering down your door?
But if you must build one, check out page 31