P90X2 Hybrid and questions about Running Shoes

So, I decided Insanity by itself just wasn't doing it for me as far as strength this time around.  Instead, I am now doing a hybrid of P90X2 and running/Insanity.  I have really kicked it up on the running.  Just two weeks ago I was running a mile in about 11 minutes and 15 seconds (5.5 miles).  My latest run was 4.4 miles at 9 minutes 47 seconds per mile (on the same type of terrain)!  Obviously I wasn't pushing myself with my running but thanks to some colleagues who run all the time and my husband who has really gotten into running lately, I am working on it.  I think my biggest hurdle at first was my stride.  I am 5'2" and everyone I run with is 6'2" and taller, so their stride is almost twice mine.  We calculated it one time and on a 5.25 mile run, I was taking 2500 more steps than my running partners!  That is crazy!

So here is my hybrid -

Monday - Crazy run up the hill of Hell. 5.25 miles.
Tuesday - X2 Core
Wednesday - X2 Yoga or Recovery/Mobility - unless I am feeling sluggish and yucky then its Total Body.
Thursday - Insanity meets XFit at the Y for 45 minutes (its a class) and then 4 mile run on relatively flat terrain.  This day is tough!!!!!
Friday - Rest if necessary (see Thursday's work out) or if I am feeling pretty good Total Body (if I didn't do it Wednesay or Balance and Power if I did).
Saturday - Another run on somewhat hilly terrain.  Usually around 4 miles.
Sunday - Yoga or rest (uh, the hill of hell is tomorrow).

After a few weeks, I'll switch out the X2 workouts to the second phase ones.  I love hybrids because I don't feel like I am locked into one particular routine!

Now onto the shoes!  I need a new pair.  I have put several hundred miles on my current pair and I need a back up pair for the Warrior Dashes we plan on doing.  I have been looking at the Nike Free Run 3.0.  They have differing levels of support  (starting at v. 5.0 and going down to v. 3.0) depending on how minimalist you want to get.  I currently have Reebok's RealFlex.  I think they are pretty close to the Free Run 3.0 v. 4.0 or v. 3.0 as far as minimalism.  I cannot find the v. 3.0 anywhere in the stores to try them on.  Anybody use the Free Runs?  What do you think?