Terrifying S.M.A.R.T. attributes

I have four drives in my PC. One is a 3 year old Seagate 1TB ST31000528AS SATA II.

About a year ago, I was using an ASrock motherboard. I started having the drive vanish from Windows Explorer, and there were a lot of unexpected drive disconnect errors in Event Viewer. A new latching-type cable from Newegg solved my problem.

This afternoon, I happened to click the Health tab in Defraggler, and the pic below made my jaw drop.
Attribute 188 Command Timeout shouldn't be in the 34 billion range so far as I know.
Attribute 190 Airflow Temperature seems to be hotter than a thousand suns.
Attribute 199 CRC Error Count and Attribute 7 Read Error Rate are both known to me.. these were going up fast before I replaced my cable.

I tested my drive with SeaTools for Windows and it passed. Using CHKDSK comes up clean. Using a tool called DriveInfo shows the Command Timeout at 'green' and 100% okay. Windows Event Viewer hasn't shown any drive read or write errors since I got this new Gigabyte mobo and installed Win 7 fresh in June 2013.

I can't afford any data loss.. I've got over 700GB of movies, TV shows, and Macrium backup images on this thing and nowhere else to store it. My computer does run pretty much 24/7 for Folding@Home, but this particular drive is used for storage. Any input here? I'd appreciate it.

That does look odd.

Here from a similar drive:

Jeez. I think I'm going to pay far more attention to the "Current", "Worst", and "Threshold" values. I can't even fathom the raw or real ones.