DR400
The DR400 will lift more payload than a PA28 with the same engine, it will fly about 10-15 KTS faster and do this from a runway about a third shorter.
The 140B is not quite a versatile as a 160 with the same engine as the 160 has two wing tanks (40lts) and a centre tank (110lts) the 140B has the centre tank and another under the baggage bay ( 50 lts). The result of this is slightly shorter range and more critical loading of the rear seats due to C of G issues.
As your intention is to use the aircraft mostly for two people this should not be an issue but if you fill the rear seats the effective endurance is cut to 2.5 hours ( with a 45 min reserve ) from 4 hours with the tank under the baggage bay full.
You can expect to cruse at 120 kt IAS.
The aircraft I know about has a zero time engine and prop, the airframe is like new but I think it will bust your budget for buying an aircraft however it is likely to be cheaper over the first ten years of ownership.