Interchangeable needles offer the most flexibility. The needle tips and cables are separate components so you can chop and change as necessary without having to purchase every needle+cable configuration. "ChiaoGoo".
Interchangeables
ChiaoGoo TWIST Shortie Interchangeable Sets
Interchangeables
ChiaoGoo Needles at Eat.Sleep.Knit
ChiaoGoo Twist Red Lace Shorties 2 & 3-Inch Large Blue 7230-S Interchangeable Knitting Needle Set, 10-Pairs Sizes US 4, 5, 6, 7, 8, Stainless Steel with 3 Cords Bundle with 1 Artsiga Crafts Large Bag
ChiaoGoo TWIST Red Lace Interchangeables Knitting Needles,Small Size
Interchangeables
Knitting Needles Tribe Yarns, London - tribeyarns
LYKKE Colour Interchangeable 3.5 Set
ChiaoGoo TWIST 4 Interchangeable Set
Knitting Needles Tribe Yarns, London Tribeyarns
LYKKE Grove Bamboo Interchangeable 5 Set
ChiaoGoo TWIST Red Lace Interchangeables Knitting Needles,Small Size