RE: Da props
You should check the balance, they come close but not perfect
at least the ones I verify. The Mejzlik 23x8 should give you more thrust.
My friend have been using a Mejzlik 23x10 in his extra 260 with good result for IMAC, it does not
spool fast but maintain a more constant speed. Give it a try and tell what you like from it.
What aircraft do you have?