There is yet another option not covered. I've owned several pieces with the pre/out, power/in option and the very best result sonically is internally soldering. Downside is resale value may be hurt when you explain what you've done and why. Good luck.
Jumper Cable Recommendation
I have an integrated amp (NAD C370) and I'm thinking about replacing the stock metal u-clips (pre-out to main in connections). Looking for recommendations on good cables for this purpose. Also interested in any feedback regarding sound improvements you have experienced replacing stock u-clips and if it's worth the effort. Thanks