PEX or Soft Copper

[RRG75]

I need to replace all my cold water lines in my kitchen sink. Long story, I used low pressure plastic lines, taking some's advice, realize now that they will not suffice. After the ball valve shut-off, I used plastic compression fittings and t's to go to the icemaker and dishwasher lines. Can I just replace the low-pressure lines with either soft copper or PEX? They are the push-in type fittings. Which would be easire/more reliable/require less tools?? I assume either option can be just pushed into the fittings, their usage is listed to be used for any plastic or copper line. Thanks ahead for anyone's help.

[hj]

Use stainless steel braided supply line with compression nut ends. For the DW either change the wall valve to one with two openings or find a Brasscraft "Add a Tee" that secures to the valve outlet and gives you a good place to connect the DW line.