Airplay/Airparrot on Late 2008 Macbook pro with Yosemite

Hi all,

I am going to update my Late 2008 MacBook with Yosemite and for that purpose I am going to upgrade my laptop memory to 8GB.

Nevertheless, I read that it is not sufficient to upgrade the OS in order to use Airplay with the Apple TV (that I am going to buy as well), but a newer hardware is required. On the other hand, there is Airparrot which seems to work with older hardware, but at the Apple store they told me that it that you lose quality and that it is not comparable with Airplay, which is much more better. So, I get a bit doubtful about Airparrot... Any suggestion/experience on that?

Many thanks,

/Ubaldo