Do you also shop EBay and here on AG? Lots of possibilities for putting together a budget system.
How are you going to use the Macbook Pro? Ae you going to load a collection of CDs, or just stream internet radio? Either way you will want a USB DAC.
What is room size? The amount of space you want to fill, and at what loudness level, is important for amplifier power requirements.
The Wharfdale 10.1s are great at $350, there are other choices, different but not better. Pioneer has a speaker model, the SP BS22 which sells for $130. Great sound/$$$, though several $350 speakers are better. Either will require stands for best performance.
Do you want FM? You mention receivers, however you might be better off getting an integrated amplifier.
One option for a $500 2 channel computer driven system: Pioneer A20 integrated amp at $270 new (can be found for less used) or a used NAD 315/316BEE, Pioneer SP BS22 speakers at $130 new, used HRT Music Streamer II for under $80. Just a thought. One would be amazed at how good this inexpensive system will sound.