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Well I've been lurking for awhile and now feel the need to post my adventure.
I'm 2 1/2 weeks into a new Bermuda lawn after I killed off and tilled my old lawn that was taken over by whatever this is:

Best I could tell was a "clumping" Fescue...anyway a real pain to get rid of and I have no idea where it came from.
I started mid May and killed off the existing lawn, Glyphosate and a little fire:

Tilled it up multiple times...a Mantis tiller and the AZ heat, what fun:

I honestly could not have picked a hotter time in the season to do this but I felt compelled for the dogs sake, he misses his lawn (last year photo lawn not so pretty which led to this):

Over to seedsuperstore.com for their suggested SS2000:

2 weeks in during 100+ degree weather here I am:

Now for the questions...
What is this (the tall blade)? Should I pull them or is it one of the 3 blended Bermuda grasses:

I have this stuff showing up all over the place how soon can I treat for it and what would be the best way to get rid of it, I am currently pulling it and it is seriously all over and pops up what seems like hourly:

Any way, sorry for the long post any help is appreciated.
I will do my best to keep updated on the progress of my Hot as Hell Lawn rehab.