[Prophesy]

Don't buy crappy cheap borgs,
If you borg, buy the most expensive models.

I'm at the point that I'd be willing to trade some cyberware upgrades for even a half, or a third even, of the humanity cost back.

Wait on it,
Natural stats seem to be more effective, borg stats only help in combat (a questionable level), not crimes or towards item reqs.
The only non combat function I've seen changed by cybers is strength, a strength cyber increases your carrying capacity (encumberance ratio) a bit, but only about 1/4 as much or so as a natural Strength lvl.

All in all,
Cyber if you want,
but wait on it, plan it out
and don't go cheap.