For me, the king of cheap, high performance speakers were the Behringer 2031p monitors, but they have been discontinued. Neutral sound, very good bass extension, good dynamic range, and could be had for $120 each. I got mine at a particularly low price period, $130 for a pair. The Infinity Primus speakers are a crazy good deal when on sale, sometimes the p363 towers hits $100 each at Fry's. The Primus bookshelf speakers also hit absurd prices at times, $60 for a p163, $50 for a p153.