I want to get series 1-7 of Doctor Who

But I don't know whether to:
A. Get the series 1-7 blu-ray boxset.
OR
B. Get the series 1-4 DVD boxset, and then the rest as separate blu-ray boxsets.

What would you recommended?

A. Definitely.

If you're in the UK I'd get the dvds if they're cheaper. There is little difference in the quality of the series 1-4 dvds and blu-ray. I've got the UK blu-ray set and it's not worth the £160/£163 BBCshop/Amazon are currently charging for it.