The best option for you will depend heavily on the condition of your Tracker. I have done both to my Trackers and I lean towards suspension over the body lift. The body lift might be easier to accomplish initially, but if your floors, body mounts or both have any rot, you will be drastically weakening the relationship between body and frame which just asks for trouble down the road with bent floors, bent mounts and collapsed lift blocks. A suspension lift can be more expensive initially, but is better off in the long run if done right. By lifting the suspension, you are maintaining the strength of the body sitting on the frame with only 1/2" max room to collapse later. Plus it creates more clearance under the front diff and the frame than a body lift will. You can get a coil spacer/strut mount style lift to accomplish the desired 2" of lift much cheaper than a full kit, and end up with a smoother riding version of the same end result.
I would suggest looking into the coil spacer/strut spacer lifts. Look for one that has 1-1/2" front spacers and 2" rear spacers. Flip or space the front upper strut mounts to match, add a pair of camber bolts if needed to put camber back into spec and pick up a pair of 90-91 Ford Crown Victoria rear shocks to put on the back. I have had nothing but good luck out of these shocks, they compliment the 2" lift perfectly and the ride is much better than even stock. Plus they are cheap, easy to find and plentiful, available at pretty much any autoparts store.