Ernie -- Syncrowave vs. Aircrafter

I used to have a Syncrowave 250 since some time ago. 

Manual: 

       
http://igor.chudov.com/manuals/Miller/Miller-Syncrowave-250-Manual.pdf

I also brought home a Miller Aircrafter 330ST welder that I bought
from the military (Rock Island Arsenal). 

Manual: 

       
http://igor.chudov.com/manuals/Miller/Miller-Aircrafter-330ST-Manual.pdf

There is essentially two questions. 

1. Syncrowave vs. Aircrafter. The Aircrafter can obviously put out
more power, up to 450-500 amps. What I am not sure is whether I need
that power for anything I may encounter. I will keep whatever one
makes sense and will sell another. 

2. This Aircrafter unexpectedly came with a dual torch setup. It has
two torches connected, with valves to select which torch gets argon,
and both torches are cooled with water. 

One torch is WP-20 and another is WP-18 (the big size). 

So what I think that I should do is, even if I keep the Syncrowave, 
to take off that dual torch set up and use it, so that I can use the
bigger torch for welding thick aluminum or some such. I suppose that
there are not any downsides to that. Am I missing anything or not?

Anyone has been in the same boat?
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