Last night, I ordered:
IMAC 21.5-INCH
3.20GHZ INTEL CORE I3
4GB 1333MHZ DDR3 SDRAM - 2X2GB
1TB SERIAL ATA DRIVE
ATI RADEON HD 5670 512MB GDDR3
8X DOUBLE-LAYER SUPERDRIVE
"wireless" MAGIC MOUSE+MAGIC TRACKPAD-AM
"wired" KB(NUM) & USER'S GUIDE
IWORK
NO AppleCare - will order on month 11 (re: in late June 2011).
For my home, NO Gaming (other then simple Web based games). Kids have proper gaming box for games. iMac 21.5" will be used for typical home usage. re: Email, web surfing, downloading, Word Processing, minor spreadsheets, minor presentations, minor photos, minor movies, minor sound recording, etc.
Also, based on Benchmark comparisons (seen in histroical posts), I got the impression the difference between i3 chip and i5 chip (for $200+) wasn't a dramatic increase. Not worth it - for my home's expected usage.
If more memory is needed (in future), I will order memory via 3rd party supplier. Thus, more cost savings as well.
Hope this helps in your base research...
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