I too feel keyless chuck is great on cordless drills but not on a drill press. I went to a local Harbor Freight before I bought a Sear press, the local store had another model or two not online and what they had that matched online was cheaper in-store.
The three you show are more alike than different. They're also sold as generic presses at several places over the internet and ebay, though the cheapest price seemed to be at a Harbor Freight B&M.
I bought one from Harbor Freight, don't remember which model # but it did look somewhat like the last one. It had horrible runout and I returned it immediately. I almost got a second one to try but the local Harbor Freight is a far enough drive I didn't want the hassle of returning it again. Next I found a "Companion" brand at Sear on clearance, a tiny little (green? or blue?) thing. It was horrible, the entire thing vibrated like crazy and after examining it, I found there was not only one bad component to blame, the entire thing had part after part that was off-spec. Another trip back to Sears to return it and I ended up with a Craftsman 12" table model, which they don't seem to carry any more as it was priced too good to pass up as they were clearing it out for next year's model, now they've gone at least one or two generations further adding frills to it that jack the price up by 50% or more, at
$200 now. The other thing I really liked about it is that it's much taller, if your project has tall pieces you have a lot more room for them without having to go to a floorstanding press.
For a 8-10" press, the Deltas looked the best to me quality-wise, but their motors are a bit small for some jobs. On that subject, some of the generic brands use a less conservative rating system for motor HP, judge also by size. With the ~ $100 Delta, it may depend on what you're using it for, it would have no problems drilling in a case, a 1/4" hole through 1 cm of aluminum, etc, but might choke on large jobs.
Rockcod, you could've just take back the whole Sears press and exchanged it, or sometimes when I ask very nicely, I can get them to open up one of their products and give me the good part if I give them the bad one, then they just do a return and repurchase at the register as if I'd returned the box they had to open to get the part. YMMV, an older employee might be more apt to help you with this if they realize there's no difference from their end, they still end up with one open box with a broken part either way.
