What about the new Agilent U1273A vs. the U1272A? I don't really like the OLED screen (ugly), but nevertheless if it has any benefit other than being new and gimmicky then I will consider it.
Regardless of what I get I am going to get a second DMM so if I were to get the 289 then I would get something with a little better battery life for day to day use while keeping the 289 for large tasks or bench work.
Also if I were to buy the agilent would it be better to go through mouser, newark, or...?
I've not used the OLED screen versions, but Dave and at least one other member have, and made reviews of the screens (as well as the rest of it). I've the impression they'd be great for bench work (not so wonderful outdoors, as they can be hard to see/read), but they also suck battery power, causing a notable reduction in battery life (why I skipped it).
The standard screen on the U1252B is fine, and the backlight is quite good IMHO, so I'm not feeling buyer's remorse at all skipping the OLED screen. Pics of the U1272B display seen quite good too, so I don't think you'd be disappointed.
If you're fixed on getting a 287/9, then the U1272B would be a good meter to have (as Dave mentioned, 30,000 count dual display is quite good, and more than suitable for general electronics). Better accuracy is nice, and if you do so, probably isn't needed in more than a single meter (cheaper too, even if not significantly so).
As per where to buy, go for the best price (considering the companies you've listed). I got mine through Future Electronics, but they are no longer an Agilent Distributor (as of Jan. 1, 2012).
They are the same ain't it ? Go for the 1272
OLED for sure, and perhaps a minor feature as well (can do a comparison on Agilent's site last I looked).