Power conditioners: necessity or hype?

[BGHD]

Some Monster power conditioners still available at the GG closeouts. Should I pick one up or is it just a glorified surge protector with fancy flashing lights? Unless I could get a Monster one at a ridiculous price, what other brands to consider (PureAV? Panamax)? Currently, just using a $20 Costco surge protector and feel a little nervous having so much stuff plugged into it. Just thinking of new things to buy/research.