Hi Kev,
Depends what you are doing with it. The tracker is an AFS floating head that has had 15' of the front taper removed and looped, to this is attached a 15' multi tip Spey line tip (identical tips to the windcutter / mid spey etc). Tracker comes with intermediate, type III, Type VI & type VIII tips only, no full floating option. It really is a line for shifting gear, big tubes etc, I tend to use it without a polyleader and tie tippet straight to the tip. IMO it bridges the gap between a Skagit and a regular shooting head, a superb line to have in the bag in case you ever need it, for bigger tubes in tight spots it is absolutely awesome.
For lighter duties, go for the AFS kit, this should handle a bit better with average size flies and will present a bit better than the tracker will IMO.
Other option is togo for one of the new MacKenzie heads, these are a far better head than the AFS, they fly and drop in fairly level rather than arse down first like the AFS, they will also carry larger flies and are more stable.
If you are after Rio gear give me a shout at the shop as I'm just about to mark most of mine down by 15%.
Cheers
Ben