For freshwater and a 3mm suit that $300 package would probably work quite well. 25 pounds is probably twice the lift you actually need. Obviously it is better to have too much than not enough, but the smaller the wing the less area there is for the air bubble to shift around when you have it partially inflated at depth. You don't need much lift until you get into deep or cold diving where you are wearing 7mm suits or drysuits, which need a lot more weight to compensate for their lift. With the steel backplate you probably wouldn't need any extra lead, and even with the aluminium plate you would not need much. I'd suggest giving DGX a call though, just to make sure their plate would be a good fit for you. Some shorter or taller people really prefer a more tailored backplate. If it fits you, though, it is a great deal, and DGX is great to deal with.