Ok - played with it for about 30 mins or so now - I'm at my office so can't generate any signals other than the demo signals on the scope so that'll have to wait until I get home.
As mentioned I had no problem with set/clear with search turned on.
It seems pretty responsive when changing settings, etc. Demo signal is a simple 1kHz square wave (see pic). I will admit I prefer the "look" of the screen on the Rigol but I will also say this screen is huge - at least it feels like it. There is no pixel doubling as far as I can tell. What's interesting is the saved picture doesn't look as good as the image on the screen. Go figure. The screen is bright, clear and crisp.
A couple of things I wasn't thrilled with, and I knew these going in but it is a little annoying - since the knobs are not pushable I you have to default a fair amount if you get all sorts of stuff on your screen (marks, cursors, settings, measurements, etc). I'd love to be able to "push to center" like on the Agilent.
The fan is noticeable but pretty quiet. Not too bad. There don't appear to be any "warranty void" stickers so I'll open mine up this weekend and take some pictures.
Unfortunately I only have a 1Mhz func gen at home right now (damn you Rigol for not getting me my 4062!) but I'll run some tests with various signals with that. Including marmads infamous "wfm/s" test -- after I check the trig out voltage to make sure my fluke can read it.
I should add that the default is sin x/x, but you can turn it off if you want under display options.