Exactly. No idea where you heard that BS about Apple ram being best blah, blah, blah -- but they pull ram from the same giant bins as everyone else.
Total hogwash.
What kind of Mac are you using now? Have you thought that it just might be outdated, or need a system reinstall and thats why its so slow?
Why not buy it stock with the 4 gigs and give it a try? Then if you need more, add it?
to go to:
12 gigs: $100 <<-- add to stock 4 gigs.
16 gigs: $200 <<-- and you have to pull the 4 gigs already in it = 4 gig boost over 12 gigs for $100
32 gigs: $3200 <<-- more than the most expensive iMac costs
http://eshop.macsales.com/shop/memory/iMac/2010/DDR3_21.5_27
Installation: http://eshop.macsales.com/installvideos/imac_mid_2010_mem_m/
And iMacs have had user replaceable ram since day one. Since the G5 iMac a 8 year old could do it.
And I hear you say "a lot" but thats a relative term.
heres my daily "a lot" -- dont get me started with tabs and windows. too many to count.
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and my desktop:
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That's a very large...um...Dock...you have