10:37 a.m. on June 1, 2012 (EDT)
As others have mentioned this is fairly subjective based on location, time of year etc. That all being said I am in the NE and try to keep my base weight below 20lbs, by base weight i mean everything except food and water and fuel. My base weight for summer trips is 15lbs, base weight for more 3 season weather(think spring/fall) is 18lbs, and base for winter is about 25 lbs. With food,water,fuel I try to stay around 25-35lbs for a 3 day trip.
Summer trips for clothing I typically don't carry any extra clothing other than a spare synthetic shirt to sleep in and spare socks. For spring/fall I add in a pair of gloves, a beanie, a nano puff, long johns, and use a 20F bag/quilt. For winter I add in a thicker down jacket, a wool l/s shirt, and a -10F bag/quilt.
Other than that my load pretty much stays the same. If your at 18-19lbs without any clothes I would say thats probably a little on the heavy side, but far from horrible. The only way to trim weight further is to either leave items behind or replace items with lighter ones.
Your loadout looks solid, but if your interested in lowering your pack weight here are some quick tips to lighten your load some without spending money.
-Leave 75% of that cookset at home, all you need is the pot, drink and eat out of it. If you really want bring a mug too.
-Leave behind the two poles for the hoop that make it freestanding
Other than that you either need to make some DIY items, or spend a little money to drop your weight further. You could make an alchy stove, get a lighter tent, lighter pack, lighter sleeping bag, and a lighter cookset. You cookset even if you already took alot of the items out is heavy at over a pound, there are much lighter options out there, cheap ones too, a small grease pot from walmart etc is only 2-3$ and weighs about 4.5oz.
Your tent looks like a solid tent but its heavy. If you really want to shave weight during 3 season you could get a silnylon tarp for around $100 and save like 4 lbs, addressing the pack and bag would be the most pricey by far. Using a more minimalist shelter and a lighter cook set is your best bet and best bang for your buck, tarps or tarp tents would both save you lbs.