Welcome (or should I say "Selamat Datang") to CNCZone and be prepared to get hooked I've been here from the beginning and it's wonderful to see people worldwide sharing idea so freely.
Back to your question. L297/298 combination are designed for bipolar motors. You can use any stepper motors (4-wires, 6-wires, 8-wires) with it. Spec of your motors depends on a LOT of factors such as torque, power supply, cost, etc. I've been using motors from scrap dot matrix printers. Check out several of my threads for some additional info.
p/s. I'm in KL, whereabout are you? May be can meet up and share some ideas, experience