was thinking of upgrading my computer sounds as well.
i was thinking the golden ear supersat 3
never heard them in person but doubt they are bad.
their forcefield 3 actually looks decent too.
for an amplifier, you wouldnt need much because the listening distance is so close 50w would do it with the 92db sensitivity speakers above.
if you chose less efficient speakers, say 89db. you would need to double the power
im not familiar with budget receivers if you want that instead of a amplifier, so i couldnt help with that.