It's up to you. They're modular. I'd pick FL2 because you've just been doing those 20-rep circuits. FL1 has 15's. I'd do FL2 because of the more moderate rep ranges. I'd hope you could handle heavier loads for those rep ranges this time around, so the program would continue to be very effective. If there are any exercises you just really don't want to go back to, then make a couple of comparable (or tougher) choices, just for the sake of variety.
The other option, of course, is to choose another fat loss program you have not done before. Alwyn's published several at T-Nation or, and I'm serious about this, you could do the Stage 2 workout from NR4W. That's an awesome looking program with a bunch of combo moves (Alwyn's favorite stuff!).
Whatever you choose, you should feel motivated to complete it. No program will work if you are not consistent in its execution. So find something that looks interesting and exciting to you. If NROL FL2 just doesn't get you excited, then choose something else.
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Lisa Holladay, CSCS
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