If I were to buy an LED model...

[Trond]

Interesting that you mention it. I have also had a HP 41CV for a while (haven't used as much as I thought because some keys are bugging me), and I recently bought a HP 34C in good condition(see the other thread on that).

The HP 34c is very good, and I'm frankly loving it. Unlike most LED calculators it has continuous memory, and root finder. I also really like the robust feel of the keys on this one. I really like the display too.

BUT many people have complained that the first batch of 34C was fragile, and often breaks down, while later batches were more robust (mine must be one of the latter). Also, before buying, take a good look at the battery lid and compartment, as this area can also often have problems.

HP 67 is said to be the most robust LED calc with one major exception : the wheel for the card reader which nearly always needs to be replaced. I was considering finding a 67 with a repaired wheel, but they are horrendously expensive.