I'm trying to choose between the following 3 bags: LV LE Roses Speedy, Prada Saffiano LUX (Blue/RED

I have a red Prada double zip that is similar to the one you are looking at (mine is the small with the crossbody strap) and I just LOVE it! It is so easy to wear and it goes with casual, business and a little bit dressy. And, the pop of red is wonderful. So I definitely vote the red Prada.
 
Honestly, I'm not a huge fan of the Speedy rose print. Out of all the Speedy designs, I like the leather ones best. You don't see those carried around a lot and they look a bit more unique. I'm pretty sure there is a red colored Speedy out there.

I like the Prada bags as well, simple and classic design. Either of those colors are good!