This receiver does not have really strong power amps. If a receiver needs a 4 ohm / 8 ohm switch then it does not have the current capability to drive speakers well. The 150 watts is at 6 ohms but most receivers are rated into 8 ohm. This makes this receiver seem more powerful than it is. If your speakers have a low impedance and or need a strong amp you would notice the difference with a Marantz, Cambridge Audio, or Anthem receiver.
Since this is a discontinued model and the price is probably pretty good I would say that you won't be able to do much better especially if you like the features.