I have the ridgid drill press. A gift card at the time + a 20% off power tools sale brought the cost under $125 for me. It performs well within it's ability (see below).
The lowest speed is 300 rpm - not great for drill big holes in steel.
There are really only 3-4 specifcations that count on a drill press
1 - speeds available - generally the issue is not going slow enough for metal or large holes in wood
see chart here
wood magazine drill chart
2 - Quill travel - better drill presses have a travel in excess of 4", I think delta has a machine that has 6" of travel. The ridgid has 3.75"
3 - "size" the 15" drill press is really a 7.5" drill press, it can drill to the center of a 15" piece, but you only have 7.5" between the center of the spindle and the rear post.
4 - HP - not as important IMO as the other specs, especially if you have slow speeds available.
There is a substantial difference between the $250 drill presses and the more expensive ones. Mostly available speeds and quill travel. Ridgid has OK quill travel (I usually wish it had more) and doesn't go slow enough, the
grizzly G7944 goes down to 140 rpm, but the quill travel is only 3.25" Think about your uses / needs regarding the above specs and you'll make a good decision.
Almost all drill presses have tables that are better suited to metalworking, you can buy or make a table that is better suited to woodworking like this one
rockler drill press table