Lenovo w540 or lenovo t440s?
Added (1). I can't chose between the two. Are the following upgrades worth the money.
Processor
Intel Core i7-4700MQ Processor (6MB Cache, up to 3.40GHz) [comes with]
Intel Core i7-4800MQ Processor (6MB Cache, up to 3.70GHz) [$140.00]
Memory
8GB PC3-12800 DDR3L (2 DIMM) [comes with]
8GB PC3-12800 DDR3L SDRAM 1600MHz SODIMM [$50]
16GB PC3-12800 DDR3L (4 DIMM) [$140]
Hard drive
256GB SSD [$320]
240GB SSD [$370]
512GB SSD [$620]
Microhard drive 16GB SSD [$40]
Added (2). these are updates on the thinkpad w540