This topic prompted me to look at framing nailers at Lowes today to see what's currently available. They had DeWalt, Bostitch, two models of Hitachi and both air and cordless Paslode.
I didn't pay much attention to the DeWalt because, well, its DeWalt. I didn't like the magazines on any of the air powered nailers. They're too long and bulky. I think most if not all of the new generation nailers are built like that. As far as I'm concerned whatever advantage there is to having a magazine that holds more nails is lost because the magazine sticks out where it can be damaged and it will be in the way in certain situations. None of those air nailers are balanced as well as the Senco 325+ but I suspect most of them are more powerful. Even my old SN4's are more powerful than the 325+. I wouldn't trade my 325+ guns for any of the air powered offerings I saw today because the 325+ is about the most comfortable gun around and thats a real consideration for someone that makes their living in construction.
The cordless Paslode is another story. Compact, well balanced and comfortable. It was also the most expensive. They're supposed to be reliable as well. I can see myself owning one someday.
One thing that struck me was how cheap the new guns are. Most if not all the air powered were in the $200-300 range. If I had to choose between the air nailers I saw today I'd go with Paslode followed closely by Hitachi and finally Bostitch.
As for finish nailers....I have two Senco SFN1 (I think, but could be SFN2). Compact, and reliable. If they have a downfall its jamming. Seems those guns have more than their share of jams, especially with generic nails. I don't know that I'd recommend the SFN1 for a DIY. I have a Bostitch 2 1/2" angled finish nailer. Don't know the model number. Its bigger and MUCH more powerful than the old Senco finish nailers. I think I paid around $170 for 3 or 4 years ago. I don't like the way jams are cleared but as cheap as it was I'm not going to complain too much. I have another Bostitch finish nailer. It shoots 2" nails. I don't really have an opinion on how it performs as I've never used it because no one around here sells nails for it! It was part of a compressor/nailer combo pack so I suspect its just a throw away piece like the compressor.
I realize that a weekend warrior is going to have different criteria than me. Most anything will probably be good enough for the limited use the OP talked about.