Hi bieny,
:welcome: to Laptop GPS World.
1. I'd suggest you to buy USB GPS BU-353 receiver by Globalsat. It is based on the powerful SiRFstarIII chipset. It is very inexpensive, too.
2. I'd suggest also to Microsoft to include the same BU-353 in future versions of Streets & Trips. BU-353 is a reliable unit, it is a proven very good performer. Because of the larger antenna size, in comparison to both, the old Pharos GPS-500, or the new
Navation GPS 168, the BU-353 unit just simply works better. Some software vendors bundle BU-353 with their laptop GPS software. MSFT could likely get BU-353 cheaper than the Pharos or Navation units.