The loose jacks were corrected in the first couple of months, jack spacing is still nonstandard, but I really haven't run into that as an issue using my SPD3303X-E, do note, however, that the SPD 3303 comes in a bunch of flavors, and the current versions are the X and the X-E.
The finer voltage and current resolution is an option in both cases, and not a cheap one given the price of the unit. I ended up going with the Siglent after finding a deal and have been happy with it. I'm sure the Rigol is a good unit, and while I like the look a little better, I think it may be physically larger (especially with the corner bumpers).