I'm looking for an affordable bass cabinet to pair up with a 250W RMS (at 4 ohms) amplifier head. Ideally no more than $700 (although I can be flexible if needed) and at least two speakers in the cabinet. What do you guys recommend? I'm aiming to play modern progressive metal primarily if that's any help. I'm in Australia and don't mind importing things if needs be but keep in mind that postage prices to Australia can be ridiculously expensive.