What are you trying to do with the hammock, and what other gear do you have aside from what you listed? This will determine your needs.
Are you trying to car camp? If so, weight is a non-issue, as is volume. Price should be your guide here.
Are you trying to motorcycle or bicycle camp? If so, volume is at a premium, whereas weight isn't. Look for options that pack down small, even if they're heavier than the alternative. For example, a poncho liner is heavier than a blue Wallyworld pad, but packs down much smaller. It makes for better bottom insulation when used in this manner, even though it won't get you as low in temperatures.
Are you trying to backpack? If so, what style of backpacking are you doing? Are you going to hike into a single camp and then do day-hikes? Are you going to be long-distance hiking? If the former, don't worry so much about weight and instead work on comfort in camp. If the latter, worry about weight and don't worry so much about comfort in camp. For example, some thru-hikers don't even carry a stove, instead relying on prepared meals like Pop-Tarts and Pringles to carry them through; whereas some base campers bring Dutch ovens and full-sized wood stoves when winter camping in order to make apple pie in the field.
Look for good deals at local thrift stores and Wallyworld. Stuff can be repurposed. Example: turn Gatorade bottles or water bottles that folks toss into the recycling (after suitable cleaning and sanitizing with a bleach solution) into water bottles for the trail. Costs you nothing, and weighs less than a Nalgene. An old can of beans or coffee can is easy to turn into a hobo stove with an old-style "church key" can opener and a pair of tin snips (be careful of the sharp edges on the can when doing this).
Really, what you need to think about first is what you want to do. This will show you which sliding scale you're on and help you choose which end of it you want to weight.