Yes you can still get Original Blueberry from DP only feminized though, and yes DJ did revise the strain and made True BB. I have grown both and in my opinon the old version was way blueberryier. As someone said above it is literally the best tasting weed ever, there is nothing like it on earth. It also has the sweetest blueberry smell ever I just love it. Also as someone said above they scored a couple grams, you KNOW when you get the real deal BB there is no mistaking it.
The 3 you are considering are an amazing line up and you will not be disapointed in any of those strains for sure. If it were me and I only had to pick one it would be Mazar for sure, that is just one of the most superior strains out when it comes to all the things we all look for in quality, nug structre, taste, smell, yield, strength I mean it literally comes in at 8 out of 10 in each of those categories. That is one of the main reasons I am getting in on the BAM Slam, The Blue Auto Mazar looks like the tastiest thing ever and it combines my favs blueberry and mazar(you cannot go wrong with that)
Also Shadey this is probably the best place I have ever found for breeding knowledge, the breeders forum is amazing. There are defintely folks on here with waaaaay more breeding experince than me(I know some but not as much as some of these guys and gals, they blow my mind with some of their stuff) But if you ever have any questions feel free to shoot me a PM, and I will be happy to help and if I can't I will be sure to point you in the right direction