Steal vs Splurge

I usually like to leave the copy cat steal to Reichel over at Copy Cat Chic, but I've had my eye on these 2 items and wanted to get some feedback from you guys.  While the "splurges" aren't necessarily breaking the bank, it is hard to pass up a better bargain.  What do you think?

I've always loved the simple lines of West Elm's parsons desk:

and was elated when I saw this in Home Decorators Collection for half the price.

I'd love 2 of them for the office/guest room, but we always end up doing our work at the dining room table.  Would the addition of this to the room make us more likely to use it?

I stumbled upon this lamp when I first went to the Jonathon Adler store on Newbury St. in Boston.  It was love at first sight.....and then I saw the price tag ($425)

Could I settle for something slightly different for $139?

How often do you compromise for price?  What do you refuse to skimp on?