The Creo, Fiery or FreeFlow RIP's will each be OK for the kind of work you are doing
PSM can output suitable data streams to each (VPS to the Creo, FF or FF2 to the Fiery and Optimised PS or Optimised PDF to the FFPS).
The Creo and FFPS are better suited to doing VDP runs or 10,000 records or more, though the Fiery isn't a slouch in that area either. The Creo and FFPS will do shorter runs, but they handle the longer runs better than the Fiery, in my opinion. The Fiery is probably the most user-friendly out of the three.
I'm not sure about the capabilities of the DC242, the 700 will cope with the stock you are using, perhaps someone else can give you more info in that area
