What is a good weight for me?

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I am currently at 135 lbs. I am 5' 6" tall, and have a waist of 27 in. My hips are 37.5 in., my forearm is 9.4 in., and my wrist is 5.875 in. My BFI is 25.78%. My goal (currently) is to get down to 125 lbs. and reduce my BFI to 24.95%. Is this goal unrealistic? (Like should I get down to 120 lbs. or something like that.) I really want to get a toned, strong, svelt body. Any help or recommendations would be appreciated.

If more information is required, I will post it. Thanks to everybody!