PA speakers :lol: classic. seriously tho i would invest in some monitors, i recently got a set of Samson Resolve 65a's and ive never looked back, also its always better when your mixing your track to have the volume low (crank it up every now and then tho :eyes: ) so you can here the small details better aswell as saving your hearing.

As for arrangeing, i personally think if youve got a few strong elements its usually better to work on them instead of trying to cram 50 million ideas into one tune.