I would say that you won't regret to put more memory in there. 32 seems like a bit on the low end, AE really loves and eats memory when Rampreviewing, and that is a really good thing. i have 128GB and i quite often run out of memory, and wish i had the double of ram. But then you always want to have more when you learn to live with the "huge" amount you thought you had :-D
put in 64GB ram if you can afford it. But maybe there is only 4 ram slots available? then i can see the problem, since last i looked (when i got my z820) 16GB ram sticks was really really expensive :-(