DIN regs

Gentlemen
Having now purchased twin 10's to further my diving experience, I now
need to equip them with regs.
Bearing in mind that my money tree has been a bit light with fruit of
late, should I take the lowest cost option and transfer my existing A
clamp reg to the new set,( this would only require the purchase of a
single 1st stage) or would it be wiser to get two new regs? and if so
I remain undecided between A clamp and DIN.
Any advice or (information on a low cost supplier of CDX5's) would be
appreciated. Gary