Numeric Newbie

[myk]

Hi there.  I'm looking at Python for some scientific/numerical 
programming.  I'm kind of confused as to what is out there.  It seems 
like it boils down to scientificpython, scipy, numpy and numarray. 
 Furthermore, numarray has some additional modules like "linearalgebra", 
"FFT", "convolve".  So what do I need to install?  It's nice to see so 
many options but it's not clear what is good, current, and has a future. 
 TIA

mike b