Oh, difficult question. I think in all convertions (export/import) you lose something. Nearly every program has its unique features that the others can handle. Thats life. And regarding modeling programs. Hard to say. Depends what money you want to spend, what features you need, wether you like the user interface or not, etc etc. I like to do things in Cinema, combined with the free version of Amapi from time to time. Others love Wings3d, others Truespace or others. Everybody must find this out by themselves. A lot do have demo versions. This can help a lot.

One day your ship comes in - but you're at the airport.