If you are going to be building 700 wheels, then I think that is a good idea because my experience with the steel rims was not enough breaking power. Also if you get another bike later then you will have a good set of wheels that you built. Also if you find a bike with bad wheels you might get a good deal knowing that you have wheels for it.

If you get a b17 and like the saddle, then you have made a good decision but not so good if you hate the saddle.

The items that you are getting for up grades can be moved to a newer bike later so as far as lipstick on a pig, I don't think this applies. Also the items / upgrades have the potential of making your bike safer and more comfortable. It looks like a win win in every case to me.

Now go and get the upgrades and feel good about it and enjoy them.