Hi,
I am planning to buy an nSpire and intend to try my hand at programming it. I've had experience with TI-BASIC programming for the 84 and have dabbled in C programming for the 89 (using TIGCC) and as such have developed software with C, Java, and Python on computers.

1. It seems that there is a CX and regular version, with the former having considerably more memory - so clearly, the CX is the superior choice for programming. However, I really hate the CX's keyboard () and was hoping if I could get a CX nSpire with the keyboard of the original nSpire () (I'd be happy with pretty much any other keyboard to be honest)

2. I want to be able to code in both Lua and C (using ndless). Which operating system of the nSpire do I want so that I can do both? I've snooped a bit and discovered that ndless doesn't work for 3.0+ but Lua only works for 3.0+. Is there an OS that supports both? Ideally I would want to be able to use both languages to code by, say, programming in Lua and calling C methods.

3. Before I get the calculator I want to play around with it. So I looked up nspire_emu but in order to run it I need a boot2 file. What exactly is this file, a copy of the operating system and memory? Is there a way for me to get a fresh boot2 off the web?

4. What exactly is the full story about not being able to downgrade your nSpire OS? Does it mean that if my newly-bought nSpire CX comes with 3.0, I can never downgrade to 2.0 and use ndless?