I've always thought that diesels make for a more relaxing drive, but with DSG petrol you don't really notice any lack ot torque in normal driving. I love my 204 DSG TSI., and the acceleration in sport mode is addictive. Mines been converted to run on LPG (filled up last night - 270 miles for £33), and I've had no issues with the motor (or anything else). I'm looking forward to getting it mapped at some point, but it's just due it's first oil service now.
Remember that the petrol vans were £1K cheaper when new (which offsets the LPG conversion a bit)., but they don't make them any more.