the walkabout head is 300w (at 4 ohms... 8 ohms would be 165w). Right now it is in the walkabout combo 12, and sounds great. But I'm contemplating the purchase of a larger cab if the need should ever arise, and am wondering what size would be appropriate. What can the head handle? a 4x10 would probably be wicked... But would an 8x10 be worthwhile? ie. would I get any return on sound out of an 8x10 versus a 4x10 with the 300w walkabout head? thanks!