GS Question #4: RAM

[gachenb@eis.calstate.edu (Greg R. Achenbach)]

I just bought a GS (see previous post) and am looking to upgrade the RAM. 
A very big priority of mine is a stable system.  It is a ROM 1 with the
stock 256k on board, and has an Apple 1 meg expansion card with 256k on it.

What kind of memory expansion should I get?  What are the "dogs" that I
should avoid?  What are the "stars" that you absolutely love?

Is there a difference between cards (performance-wise) based on the types
of chips they use?  A while ago, I saw several cards that used SIMM's.  Is
this a good option?  What is a ZIPP as opposed to a DRAM?

Once I get a card and put it in the memory expansion slot in the GS, what
should I do with the Apple 1 meg GS expansion card?  Can I still use it in
another slot?

How much RAM should I get?  Is a 4 meg card enough for most uses?  In what
situations would I need more than 4?

What would be a good price?  Where are the "deals"?

Does anybody have a GS memory card for sale?

Thanks in advance.
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Greg Achenbach             gachenb@eis.calstate.edu
Los Angeles County Outdoor Science School

"Society is like a stew.  If you don't keep it stirred up, you get a lot of
scum on top."  Edward Abbey