What hardware helps for optimum export speed?

Question

I'm about to purchase a new laptop, and since I'm often on location, processing and exporting large numbers of processed files in a hurry, I'm wondering what hardware is most helpful.  Obviously I'm going to get the fastest CPU possible, and a fast hard drive, but what about RAM?  Does the RAM speed make much difference in import, process or export times?
Also, I'm considering a model that has 2 internal hard drives.  Would LR export speed be improved by exporting to a second internal drive?.   And if so, and one of those drives is an SSD, should that be the primary or secondary drive?
TIA, Steve.

Answer 1

OP here.  Thanks for the responses.  Thanks especially to Ian Lyons for posting the link to the Optimizing Adobe Lightroom article ( http://macperformanceguide.com/Optimizing-Lightroom.html ).  Among other things, the article suggested that export speed could be increased by dividing a large operation into several smaller ones, to best utilize multiple cores and hyperthreading.  I decided to run a few tests:
First, I exported 300 files in two simultaneous operations of 150 files each, to two different internal drives on my home computer ( CPU is a 4-year-old Pentium 940 EE 2.4 Ghz dual core with hyperthreading).  Then I exported the same 300 files in a single operation.  The split export took 5 ½ minutes, vs 11 minutes for the single export. 
I know:  It’s already a flawed test, because I had introduced an additional variable by exporting to two separate drives in the first test.  Since the times that I’m most in a hurry are when I’m on location using a laptop, that test wasn’t of much use, as laptops (with few exceptions) have only one internal drive.
So today, I did a few more export tests, all from and to the C drive:
300 files exported in a single operation:  12.5 minutes
The same 300 files exported in two groups of 150, simultaneous operations:  10 minutes
The same 300 files, this time exported in three groups of 100:  7 minutes
Interesting result, as the article had led me to expect possibly slower results on test #3, due to increased overhead.  However, file caching could be skewing the (later) results.
So next, I tried a similar export test in reverse order with different (smaller) files
250 files divided roughly into three groups, processed simultaneously:  4.5 minutes
Same 250 files processed in a single operation: 7 minutes
There still may be some skewing due to file caching, and due to using different files for the two sets of tests.  However, it seems clear that for my purposes at least, exporting large quantities of files in several simultaneous operations saves a significant amount of time vs a single large export.  Also, the initial test (as compared to subsequent tests) does seem to indicate somewhat faster export when using two drives.
BTW, no resizing involved, apart from the occasional cropped image.