i believe that the guides used by the government for healthy weight ranges for height can only be used as an indication. every
body is different.
if you feel you could lose a few more lbs and still be healthy - go for it!
you might actually find that once you get there, you rather being a little heavier. go with the weight goal and do take your measurements. you might find that you lose more inches than pounds at this stage in the game. especially if you are doing weights - your body weight may be a little higher than you initially thought although the measurements tell a different story.
my goal was initially 145lbs but after reading a bit more, i decided that 130 was doable, but I will be focussing more on my health and clothing size. if I weigh 150lbs and am a size 10, i will definately take it!
just be sensible and do it properly. that is all you can ask for
congratulations on reaching your 'initial' goal too