Best tubes for 700x23c?

[Running Mommy]

Conti Grand Prix 4000's have been a godsend for me! Living in the desert we have lots of "pokey things". I've had 2 flats in three + years.

[BleeckerSt_Girl]

I have Continental Grand Prix 4 Season tires (700x25) and am very impressed with them. Can't believe the sharp jagged rocks I've had to go over a lot lately and they didn't even blink. The streets of our town are being torn up and sewer pipes replaced everywhere, and Boy it's a nightmare of nasty sharp rocks and debris scattered so thick on the street you cannot dodge them- you just cringe and pray and go over it. Rocky gravel would be better since your tire could sink into it a bit. I hate it when you catch just the edge of a sharp rock and it gets shot out from the side of your tire like a bullet with a creepy snapping sound like a slingshot. Aghhhh!! But these Continentals are seemingly taking it all in stride.