Opinions: Used BAT VK-51SE or New VK-23SE


Looking for any BAT owners out there that would have an opinion on which piece I should go with.  I can get a used VK-51SE for slightly less than a new VK-23SE.  The 51 is from ~2003 if my google searches were correct.  The 23 is obviously newer which means newer technology.  But that 51 was their top dog back in the day and all the reviews I can find rave about it.  The 51 is factory refurbished as well.

I'm leaning towards the 51, but would appreciate any thoughts BAT owners would have.  
snafujg
A used BAT VK300  has popped up on here for a great price. But I'm trying to figure out if that is worth the cash or should I save some money and get the 3000 SE?  Or wait for a used 300 SE in the same $2200 range.  

Is the 3000 SE worth the extra money over the 300 SE?  Anyone compare the two?
snafujg

I,too, am interested in auditioning the B.A.T. VK-3000SE integrated.
If/when I find a demo, I will post here.

Happy Listening!

John and others. I'm currently running vk-30se with vk-600se and I'm happy with but probably will have an opportunity to upgrade to vk-51se but this cost some money. Question it it that is sonically justifiable ? I'm mean .. will I notice the difference with my JBL L300 speakers?