STANDTO if it's 4 seats and touring for 30k than an AA5-A or B is the way to go. Much nicer than a PA-28 to fly and faster than a C172.
However if you actually want to FILL the 4 seats AND go touring then a Piper Dakota / Cherokee Six is the only options I can think of for 30k and you'll have to search for one at that price. If you want to spend a bit more, there are a few Reims Rockets (C172 with 210hp engine) around which have great short field capabilities.