I too, have the HDPS block. I don't mind the longer pull. I have long arms. Personally, for what I paid for the block, easy conversion I did myself and I can change it back (if I ever wanted to). True I cannot fire my gun with the stock folded closed, but I don't see that being realistic.
Either way- whether you spend the $$$ for a true graft of the receiver stub, or just get a block- it will be a cool gun.