I'd recommend something like Lowa Renegade. They're light, waterproof and require no break-in. They also come in regular, wide and narrow widths to accommodate most foot sizes.
Boot fit is vitally important, especially so if you've never walked in backpacking boots before. It's worth the effort to go a considerable distance to an outdoors store that offers an extensive selection of boot models and sizes, as well as expert staff that can help you find the boot that's best for you.
IMO your boots are the most critical purchase you'll make. Don't skimp on the cost or try to buy online unless you have no other alternative. Otherwise you'll risk regretting your decision with every step you take.
one or more gifts or other benefits from the co-op.