PPCGeeks - Bluetooth GPS receiver specific question.

OK...so I think I might grab one of the Bluetooth GPS receivers and use it with the Mogul but I had a few questions. Mainly, what is a good receiver to use? I don't mean to sound cheap but this is more or less something to play around with and not at all something that I need because I don't really drive around many places that I don't already know. But I'm a gadget-head and I just want to do as much neat ish with my phone as I can! I found this one on geeks.com and it's like 38$ which is definitely fine. I also found another one for about 50$ with the sirf chip which I hear is better. Anyone have any experience with them or any other units around 50$? Here's a few links.
http://www.geeks.com/details.asp?inv...T-BT-5&cat=GPS

http://www.geeks.com/details.asp?invtid=GPT-801&cat=GPS

Thanks in advance!