It would be hard for me to give you an opinion of one over the other (I've either owned or own each of the racquets you mention) but I will try to give my opinions on each:
Fischer M-Speed Pro. No. 1: I think this is truly a great frame that does everything right. To be honest, I can't remember why I got rid of mine but knowing me, I will probably end up getting two more again and sticking with them. Actually I remember why I didn't like them, it wasn't consistent enough at the net for my taste. I think it didn't have an equal when it came to groundstrokes, and serving was easy, but I would get some volleys that would float on me and some drop shots that just wouldn't "drop".
Technifibre T-Fight 325: This was a solid stick that seens to have been made with the mold of the Prestige Classic. The one I had was professionally cut down to 27 in. so I can't tell you how the extra length would have helped but it was definitely manueverable at the net and felt good on groundstrokes. My only gripe with this stick was that I wasn't getting the pace I normally get on flat groundstrokes. Also I wasn't able to get my usual high kick serve that I got with some other sticks (like the M-Speed). Again this is a really good stick but there was nothing but the cool paintjob that stuck out.
PK Redondo: I just got this on Friday and got to play two sets with it on Saturday (yesterday) morning so my opinions will be based on a couple hours of play. First things first, this racquet did not seem to be as flexy as its numbers from TW indicate. Don't get me wrong though, its stiffness was perfect to me. Groudies were deep and heavy but it's going to take me a sec to get the groove of getting some heavy topspin. I had been using the M-Fil 300 so getting readjusted to the 18x20 string pattern will take some time. I noticed that since I was hitting deep balls, a few of them were long (though not by much) so some topspin would have definitely helped. Of the three sticks you mentioned this was by far the best one for net play. I was hitting some incredibly accurate volleys and even my mishit volleys were winners. Its stability is very evident when at the net. Lastly, the serving was good but I could tell it will get better. I was just starting to get the groove when the match came to an end. One thing I can comment on is the deep and heavy topspin I was able to put on my second serve with no effort. For an 18x20 string pattern, this thing seemed to be good at hitting spin serves. I will post another review on this stick when I get some more court time with it. At this point I like it and will probably get a second one by the end of the month.
