UNIX: Do I need/want it? Which one should I get?

[Raouls Used CamlShop]

I just got a Scepter 286 with 40meg and vga monochrome.
I've got a few questions and did not know where else to 
post them.

I'm more used to unix than dos, but am not sure if I need/want
to go to unix.  I currently have Borland's Turbo Pascal 5.5,
Turbo C++, and Turbo Debugger and Tools.  Would these (among 
others) programs have a problem away from the MSDOS environment?

With 40 meg, do I really need unix?

And if so, what unix or unix-clone should I get?  I keep seeing
ads for Coherent in COMPUTER SHOPPER.  The price is certainly
attractive enough.  Any comments? 

Thanks, 
james seymour
camelsho at matt.ksu.ksu.edu