Yes better screw terminals can be soldered to RAMPS. The ones that ship with many boards are the cheaper end of the spectrum.
Note: I've successfully used Phoenix removable screw connectors (the two-part ones) in place of the standard screw connectors, but to get it to fit on a standard RAMPS board I had to grind the edge of one of the connectors off to make it fit (runs up against the power connectors if you're also using Phoenix connectors for them, and the overlap is about 1mm). This makes very easy to plug/unplug without disturbing the screw terminals, as excessive screw/unscrewing damages the wires, and the screw terminals themselves can eventually fail (especially if they're cheap - eg: the screw threads wear, etc).
Note: I've successfully used Phoenix removable screw connectors (the two-part ones) in place of the standard screw connectors, but to get it to fit on a standard RAMPS board I had to grind the edge of one of the connectors off to make it fit (runs up against the power connectors if you're also using Phoenix connectors for them, and the overlap is about 1mm). This makes very easy to plug/unplug without disturbing the screw terminals, as excessive screw/unscrewing damages the wires, and the screw terminals themselves can eventually fail (especially if they're cheap - eg: the screw threads wear, etc).
