Question about 68030 based Sun server (aka 3/480)

[at cloud9.Stratus.COM]

We currently have a 3/280.  A while back we got "an offer we couldn't
refuse" (at least I hope so) to convert our shabby 3/280 into a gleaming
3/480.  We paid our money and got in line to get a new CPU board (I think
that's how they're dealing with it).  Now for my questions which you
Sun-Gods out there may  feel free to answer in excruciating detail:

	. What *exactly* is the performance advantage b/w the 
	  the 3/480 and the 3/280 ? 

	. The 3/80s we have run *just* as fast as the 3/60s 
	  (i.e. absolutely no performance increase) Will this
	  also be the case for 3/480s as compared to 3/280s ?

	. Has anyone in TV-land actually gone through an 
	  upgrade ? If so what was your experience ?

	. Lastly, what is involved OS software wise (i.e.
	  upgrade tape etc.) in going from a 3/280 -> 3/480 ?
	  Is there going to be a lot of software rearranging ?

Thanks a lot for your help! 

Farooq Butt
fmbutt at cloud9.UUCP