System 2 is mine and system 1 is a friend's. I use mine for photoshop, premiere pro, etc. my friends is all into gaming.
My thoughts on the limitations of each:
System 1: Needs a better psu than zebronics. Also the 1600mhz ram might underclock to 1333 as it hasn't been overclocked. The h67 mobo doesn't support overclocking.
System 2: The 5770 is slower than the 550. Ram could have been faster, maybe overclocked.
I choose the second system.
For the first yes your right the PSU is the... must change .
550 is a non Ti ,so the differences betwenn them are not to big.
You don't need to overclock your RAM you need more RAM if editing, do grafic and for multitasking. 1333Mhz is ok is native for Sandy.
The second system. The first system maybe in for some trouble, the memory that is being used is Kingston HyperX which most likely is running at 1.65v. The 2nd generation Intel® Core™ processors only support memory at 1.5v ±5%. If you are running 1.65v memory at that voltage there is a good change that you are going to damage the memory controller on the processor. Since your friend already owns the memory have him go into the Bios and check and in needed change the voltage on the memory down to 1.5v so that he doesnt damage his processor.