The UPA-5 will be fine for the volumes you are looking for, as would any of the receivers you see us mentioning on the forum, you can achieve loudness levels that can leave you deaf with as little as 100W. To get really insane levels, say constant a 105db you need much more power than most people are willing to buy, I estimate it to be around tha 700W the M80s are torture tested with, but the power required is all relative to the room and listening distances.
Most of the Electrical Engineers I know have no trouble finding jobs within their feild of choice or even outside of it
Calculus 2 brought down the GPA's of some of the brightest people I knew in University. I only looked at it briefly from their notes and I didn't want to have anything to do with it.