Size Does Matter

I think your hand needs to be played very cautiously, due to the fact that SB is a solid player. He called a big raise in terrible position and then led into you on a draw heavy board. At this point, I could very easily see him holding QQ in this position, not wanting to shove pre-flop with such a deep stack, or a flopped set. He knows you are an aggresive player and if he is a thinking player he would lead into the aggresive player everytime with a strong holding in this position hoping to be raised.

I think just calling on the flop accomplishes a couple good things for you in the hand. It gives us an oppurtunity to see the turn (he cant jam to a raise). It will slow down any PP lower than jacks. If the third diamond does fall and he has a set it will slow him down as well providing us with a cheaper showdown. And finally, we have position to re-evaluate the situation after the turn.