i happen to have had the same dilemma going into this year of college where i wanted good ass speakers for 500
i would totally recommend the M-Audio bx8 d2. long story short they are great because they are studio monitors, which are very clear if you place them correctly, but when i got mine i found they work phenomenally as just regular speakers too.
for 500 you could get these and the 1/4 inch cables to go with it in sure. i would recommend them because they are built for clarity and durability. its well worth it to spend a lot of good speakers trust me. and with 2 8 inch cones, the base is very good and accurate.