For a private ship that will not be carrying 6 fullsized pax around the country side a Seneca 11 would not be that bad. From a commercial point of view a seneca would be useless, not even comparable to a Baron, 310 or Aztruck.
However for a private a/c the Seneca 11 is cheap to run, as long as its looked after properly. Reasonable quick and quite roomy. We all know that Pipers are nicer to sit in than Cessnas. $200,000 would pick you up a nice Seneca 11. I am only going on my exp, only have about 40 hours in them, however i have to agree with Jamair, people to tend to prang them on landing. Never really had a problem myself.. So if you havent already, hire one, fly one, speak to engineers and owners. Otherwise would highly recommend a baron, but then your running cost increases by about 40%. Good luck.