Hello, My mac died I had to order an a computer as an emergency. I got the top end iMac fully speced out expect for the RAM. I am legally blind and would rather havre a tower and continue to use my 55" that I sit 4 inches away from and still can't see it. So I need a Monitor arm that can support the iMac (I got it with VESA mouynt) which can be moved in and out (2 seconds like a human arm) so I can move it back and bring it forward. I need to ordered it ASAP and don't want the cheap crap for $70 on Amaxzon Canada. I have a 24" arm that was $200 CDM back in 2007, but not sure if it would support the iMac. I can't remember the name of it and it's deep in my closet. I am going to have the arm attached to a cheap IKEA desk so the monitor hovers over the keyboard and mouse. I also need a USB > HDMI so I can use my TV most of the time and the iMac screen for color work when working on my weightloss journy Vlog (I weigh over 550lb, legally blind, I have cerebral Palsey and more disabilities. HELP P.S. I am on disability Assistance so Debt here I come.