Thank you -- I just couldn't remember Karim's last name. I've actually met Mr. Kane and Mr. Hall, so it's easier to remember them.
Clammy, if you have your mind set on what you are going to buy, then buy it. You know it will be frowned upon (if it's even permitted) in any GUE class. I suspect you may have known that before posting. There are many gear choices out there that are not Halcyon, but are quite satisfactory to meet GUE equipment requirements and recommendations.
If you buy a wing which is an appropriate lift size for the diving you are doing, then you CAN remove the bungies at a later time. But I sure don't understand why you want to dive something for recreational diving that you intend to jettison when you get to technical training. If it isn't advisable for diving where the risks are higher, why is it acceptable or necessary for diving anywhere?
The bottom line is that, if you are contemplating training with GUE, you should take GUE's advice, and contact an instructor before purchasing equipment.
A good buy on scuba equipment is only a good buy if the equipment you get at the reduced price is equipment that is designed and works well, suits you, and is useful in the long term. Otherwise, you end up spending much more money in the end.