mismatched 800 pair, which to upgrade as master?

[Celts88]

I've got a pair of D-Premiers and also undecided between either:

• A 1000Pro (Master & Companion), or
  
• A Pair of 250Pro's (both Masters)
  

I'm leaning towards a pair of D250Pro's as that gives me more options in the future:

• Sell one if needs be
  
• Can seperate and use as singles if required
  

It's 990Euro extra for the pair of 250Pro's, but if I had to sell should more easily get this back, rather than having to sell a Companion (and a Black companion one would be ever harder to sell)