You have a wide variety of trees mentioned here. Adams is a full-sized tree, 25X25Ft with outstanding foliage and beautiful pink flowers. Coralburst is a compact growing tree but will obtain a size of 12X12FT or greater in time. The branches of this tree will become covered in light pink flowers. There are few trees the shape of Coralburst and they are very impressive over time.
Sugartyme is pure white but a fullsized crab as well.
Prairiefire is perhaps, one of the very best crabs you can purchase with an intense, almost electric red color and dark foliage. They are usually available and worth driving to purchase if you can find one. I will tell you that they are also very large and will obtain at least 25X25FT or greater in size.
I would look at your site and determine the size crab that you want that will fit your yard. While most crabs are large trees as mentioned above, there are smaller varieties as well.
Camelot is a 10X10FT crab and a beautiful pink.
Candymint is a smaller crab as well. I have two of them in Maine and they both bloom profusely with a peppermint candy colored flower. They also have a downward sweeping form and will fit smaller yards.
Tina is in the same league as Prairiefire. It obtains a 10X15FT size, wider than tall and will become absolutely covered in thick, white, flowers. One of the best.

Goodluck with your decision.

I saw a prairiefire at Home Depot and should have bought it. Its was absolutely beautiful and already in bloom ... but for $36 ... it was a nice 6-7' 1" caliper tree. Its at the top of my list, but I can't find it anywhere. I know if your patient, it'll show up a few times over the summer. Last year, the best selection of crabs showed up in late summer, around late Aug or early Sep ... and for only $29 each.

Funny, I came to the tree forum because I was having a hard time deciding which crabapple to get and someone had already posted my question! :-)
I've been trying to decide between Prairiefire and Coral Burst.

I have a large bed with shade plants and we decided to cut down the 3 large maple trees that were growing in it. Now my shade plants need more shade! There's plenty of room so I was originally leaning toward the Prairiefire, but thought maybe it was too "common". I had seen them at Home Depot also but when I went back to get one, they were sold out. I didn't think to ask if they'd be restocking or not.