Aquatic_Robotic,
FWIW - I used an Atlas V8 bipod the first year I started shooting F-TR. It is quite similar to the Harris in terms of its stance/footprint. The advice given above, by some folks that definitely know what they're talking about, is a good illustration of the range bipods currently being used in F-TR. The top shooters generally use a sled or ski type just as described above. These bipods have a very wide footprint and offer greatly enhanced stability as compared to something like a Harris or Atlas. Most of these will set you back somewhere in the range of $250 to $400, depending on the manufacturer, so the decision of what to buy should be considered carefully.
Because of that, my suggestion would simply be to go shoot a match with your Harris first, and see whether you would like to take it any further. If you get bitten hard by the F-TR bug like the rest of us have, then you can decide how much you would like to spend to upgrade your current setup, and where best to spend it. The bipod would definitely be a good place to start, but the sky is really the limit once you get into it. For that reason, unless your funding for shooting is essentially unlimited, you will want to be judicious about how and what you upgrade. Trust me, simply by competing in a match you will see lots of different types of equipment and can start to think about what options might serve you better. The real key is to get out and shoot, regardless of what setup you have. In midrange matches at the local level, the Atlas served me quite well and I enjoyed a reasonable amount of success using it.
Generally, first time shooters are not going to finish at the very top of the list, regardless of what setup they have, so my advice is to go shoot, do the best you can, and see how you like it. Don't worry about how competitive you'll be the first time out, just take in the experience, have fun, and get as many tips from the veterans as you can. Once you get your feet wet, so to speak, if you enjoyed yourself and wish to continue competing in F-TR, you'll be in a better position to decide how and what to upgrade. If for some reason you don't care for the competition, at least you won't be out hundreds of dollars on a bipod that really isn't very useful for most types of shooting other than F-TR. Good luck with it and let us know how things turn out.