First thing, you are not calibrating only your TV but a system - which includes display, video sources and the room where these are located.
There are a couple of folks who have used spyder before. Do a search and you could PM them if you dont get responses to your thread.
Relatively speaking, Spyder is the most flexible (and obviously more technical). Other options are:
AVIA (Ovation)
Digital Video Essentials (DVE)
Sound and Vision Home Theater Tune Up (co-developed by Ovation and S&V)
The latter two are the least expensive and have everything you need to set up your HDTV. AVIA has some test patterns that the others do not, intended for more technically savvy people.
As a general reference, the following videos are excellent to understand what calibaration is about
Perfect Picture: A professional explains TV calibration
Perfect Picture: 4 steps to DIY TV calibration