xtrema312, ironwood will be heavier than the standard model and come with actionboo limbs rather than actionwood. Some people like the added mass of the ironwood and some like it for the smoothness and speed of the boo. BW states that you'll gain about 2fps going with the boo. I don't find that worth the additional cost. However, if you like one of the above reasons or simply like the look it is by all means worth it. It really comes down to a personal decision.
Personally, I wouldn't buy the ironwood or exotic just to get the boo limbs or the heavier riser. I do have a habit of buying the exotic models because I like the looks
If wood choice doesn't matter to you, I say go for the actionwood bows and save yourself some money, but if you are a sucker for nice looking bows I think you may find yourself a little lighter in the pocket (like myself).
Oh btw, it cost $200 more for an exotic model and $120 for the ironwood...Mike