you might remember me from such threads as "is this safe" and "another question about ohms" i either need to get another amp head, one that can handle two ohms or get an 8 ohms speaker (15). i found a carvin 600 head here on talkbass for $300 and shipping and i am very intrested, i am trying to sell my amp now. which way would i be better of. i have a hartke 2000 head now. and if the speaker which one?