[again!] System req. for Grasshopper - 16gb vs iCore 2.30

The issue goes like this - I'm going to buy one of the Lenovo's laptop from W520 series. The prices for those two config. below are almost the same. I'll be grateful for suggestions that helps me to decide which one I should choose. I'm going to work on quite heavy models in Grass. (one of parts in my PhD).

1st:

Intel Core i7-2820QM Processor (2.30GHz, 8MB L3)

8 GB PC3-10600 DDR3 SDRAM 1333MHz SODIMM Memory (2 DIMM)

NVIDIA Quadro 1000M Graphics with 2GB DDR3 Memory

or

2nd:

Intel Core i7-2720QM Processor (2.20GHz, 6MB L3)

16 GB PC3-10600 DDR3 SDRAM 1333MHz SODIMM Memory (4 DIMM)

NVIDIA Quadro 1000M Graphics with 2GB DDR3 Memory

Best,

Przemek