...or other toys?
Off topic I know, but approaching the end of my PPL training, I too went shopping for a GPS (got a Garmin GPS III Pilot at the time, but that's not my point). At about the same time I also bought a portable radio transceiver.
A few years down the line, I've realised that aircraft radio and electrical systems are more likely to break down than my PPL navigational skills. The GPS has been helpful but the radio has got me out of trouble! I use the GPS less now than I used to, but won't board a light aircraft without a fully charged backup radio.
If you are lost, someone on the end of the radio will help you find yourself. If you are out of communication, the GPS will just smile sweetly back at you.
I don't hold with those who think GPS's somehow make flying more dangerous (I think its the pilot who does that) and I wouldn't be without mine. By all means buy yourself a GPS, but get a battery portable radio as well, and if your budget is at all limited then I'd advise anyone in your position to get the radio first.