OCZ is having some financial issues as a company.

In the past, a greater proportion of their drives have died than most of their competitors.
I personally have had good experience with their drives...

The Samsung 840s or Intel 520s are comparable in price and a little better in most benchmark comparisons.
The Corsair Neutron SSDs seem to benchmark the best in most tests, but haven't been around that long to see how well they last.

I'd consider changing your SSD, anyway... because even with a warranty, if OCZ is not around it wouldn't be worth a lot.




I'm not sure how strong of a card a 650Ti is.
If that's half the price of a 670, and the best for the budget, then go with it.

From others building systems, the 660Ti looks to be the minimum card that others have even considered for a system.
With most looking towards superior cards than that.




One machine vs multiple machines...

You can instant swap from any region to any other region, on the same machine.
So that is going to give you more precise control.

Also if you one-box any kind of a game, the single very powerful system is going to rock those games much more so than a half system (with two for the 10-boxing).

However the two systems that can each handle five, are going to be easier to afford.
You could upgrade each system, every other year.
If you wanted to stay on the cutting edge.
Financially that's going to be easier than upgrading a monster system every two years.

There have been a few posts by people who have split their boxing across two systems.
It seems to work out okay for them.
Prepared and Invisahealz also play with their army of accounts across several machines.