ETA: I read that you already bought a Glock. Good choice.
Here's a full size, .45 ACP DA/SA that meets your needs...
http://www.smith-wesson.com/webapp/...57894_757775_757751_ProductDisplayErrorView_Y
Now in all seriousness, I've had a Springfield 1911, a FNP-45 USG which was SA/DA with a decocker/safety, and currently have an M&P 45. I've shot a friend's Glock 21 quite a bit and his Glock 30 a couple times. I also owned an XD in 40 and have shot several Sig's in 9 and 40.
I find the M&P the easiest to shoot well and the most reliable of the bunch of .45's I've shot. It will shoot whatever I put in it, whether it be cheap, dirty ammo or really nice hollow points, to some hot hand loads. Magazine capacity is "only" 10, but to me that is enough. It is by far the slimmest double stack .45 I've ever held in the grip width department. I really love this pistol. It's a 4.5" barrel version without a thumb safety and it has Ameriglow night sights now. The whole thing including a serpa holster and night sights cost me about the same as a Glock would have.
The FNP was a fun gun, but was massive in the grip area with the really wide double stack mags, basically wouldn't shoot 230gr ball/fmj ammo because the mags were too short for it, and the safety/decocker was in the wrong place for my thumb. It was in the way all of the time and the actuation was too soft so it was really easy to accidentally push it on safe while shooting it. Also, I couldn't ever find a holster that would fit it and the only night sights available for it were the factory ones which were never in stock. I tried to order a holster/mag pouch/"practice" barrel from the FN eStore, but it was back-ordered. In fact, I think it is still on back order with them and it's been well over a year since I ordered it. All that to say, with the 185gr ammo it was very accurate, and was by far the softest shooting .45 I've ever shot. FN's customer service was good, but in the end ergonomically it wasn't what I wanted, so I sold it. I would not recommend buying one based on the safety's softness and the inability to shoot 230gr stuff. That's my opinion though. If you got one of the non USG models that just has a decocker, nose manual safety, i.e. 2 position lever instead of 3 position, and you don't mind shooting only 185 fmjs, go for it.
Glocks are Glocks. Around here, they run about $100 more each than an M&P or XD, but are about equal with a FNP/FNX or XDM. Triggers are stiff and long, but very consistent. I've never cared for the U shaped rear sights that are standard, but I would replace them wit night sights anyway, so that's moot. For concealed carry, I think the 30 is where it's at. Glock reliability with a 10 round capacity in a compact .45. What's not to like??
XD's are very easy to shoot well and generally have nice triggers. I really don't care for the feel of the grip texture on the XDMs though.
Never cared for the grip texture on a USP, but the HK45 feels awesome in every way. If they weren't so expensive, I'd have one.
As far as what I'd buy for a truck gun, a Sig 220 would be nice if I didn't go M&P.
Hope this is useful
Justin