Crossfire or Upgrade?

Hi everyone

I currently have a Sapphire Vapor-X Radeon HD 7770 installed from February and was wondering if I should buy another and Crossfire or buy something new like a 7870 LE.

These are the products I'm talking about:

7770 - http://www.amazon.co.uk/gp/product/B007R9NSK6/ref=ox_sc_sfl_title_8?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE)

7870 Le - http://www.amazon.co.uk/gp/product/B00AM3A7JY/ref=ox_sc_sfl_title_1?ie=UTF8&psc=1&smid=A3P5ROKL5A1OLE

Where would the Crossfired 7770s be placed on the Tom's Hardware GPU Performance Hierarchy: 

http://www.tomshardware.co.uk/gaming-graphics-card-review,review-32803-7.html

 Thanks for your help!!

No crossfire.  Get a 7850 and call it a day.  I have a 7870 and wish I had grabbed a 7950 instead for the 3gb of vram.

 

7870 Crossfire are supposed to show up right under titan performance.  So try to use that a a guide for crossfire ranking.