One thing I have learnt, when buying archery equipment, especially a new bow, is that you can't beat
talking to an experienced archer and/or someone at your local archery supplies. A bow and other equipment may look very nice in a glossy picture on the www or in a magazine, but it might not be suitable for you. If you go to your local archery shop, tell them that you are a beginner looking for your first bow, arrows etc, they will have you kitted out with the best bow for your size/strength/requirements with a set of arrows that work with the bow and the necessary kit that you need to get started.
From my experience, archery shop staff are a pretty friendly bunch (they don't usually bite
) and are useful people to know. Buying stuff of the www is IMO only worth doing, if you know EXACTLY 100% what you want e.g. a rubber arrow puller. Anything more 'technical' needs to be tried before you buy.
Good luck - maybe see you in the 2012 Olympics