Initial playtest thoughts...
I had a solid hit with the racquets tonight for a little over 2 hours. I started with my Slazenger pro braided, and once my strokes were warmed up, I went in the following order:
Head Youtek IG Prestige Pro
Wilson BLX Pro Staff Six.One 90
Babolat Pure Storm Ltd GT
Tecnifibre TFight 325 VO2 Max
I played with each racquet for ~20 minutes - hitting groundstrokes, volleys, overheads and serves.
Head Youtek IG Prestige Pro
This racquet had a very solid but dull feel. Decent access to spin and power on groundstrokes. Slice shots were solid as expected with most racquets in the prestige line. Racquet head felt a little 'slow' when maneuvering for volleys at the net. Overheads and serves were solid. Overall, a decent racquet.
Initial Grade = 7.5/10
Wilson BLX Pro Staff Six.One 90
On paper, this racquet has one of the biggest sweet spots in my group of playtest racquets - however, on court, the sweetspot felt small. I couldn't get much pace on my forehands and backhands. Slice shots were amazing. Volleys were decent. Overheads and serves were so-so. I felt like lost a little pace on my serves from the heavy static weight of this beast. Plus the racquet is so head light, that I would want to add a some lead tape at 12 o'clock. I also feel like a different string set-up would benefit this racquet greatly. Overall, it left me feeling luke-warm.
Initial Grade = 7/10
Babolat Pure Storm Ltd GT
This racquet was a pleasant surprise. I have pretty long strokes and can generate my own power, so despite the small sweetspot, I felt like I could really whip the racquet head and hit the ball with a ton of pace. Off center shots or defensive shots you might hit when pushed back deep behind the baseline, felt absolutely anemic with this racquet. I feel like Babolat has a winner on their hands if they just gave it a more open string pattern. However, this frame was by far the most accurate and precise stick that I hit with all night. Slice shots were amazing. I felt access to spin was decent despite the 18x20 string pattern. Volleys were sublime as the head could easily be maneuvered into position. Serves and overheads were decent but not spectacular. I felt like I lost at least 5mph on my serves (compared to my Slazenger). If I went with this racquet, I'd need to add some lead tape to the head (@ 9 and 3 o'clock + 12 o'clock).
Initial Grade = 8/10
Tecnifibre TFight 325 VO2 Max
First off, this was the best serving racquet I played with all night. My tennis coach (an ex-touring pro) has mentioned that my first serve is regularly in the 120-125mph range. I felt like I was serving at least 5 mph more with this racquet. At the net, I found this racquet easy to knock off solid volleys with. I made some of my best stab volleys all year with this frame. Overheads were the best of the group. At the baseline, I had a little trouble generating topspin on my backhand side. However, as I played with the racquet more and more, I felt like I was starting to figure it out. A few people cautioned me that this racquet could be tricky to 'whip' due to it's higher swingweight, but I found it easy to maneuver with my wrist. Slice shots were very, very good. This was the only frame I hit with all night that made me feel like I could hit clean winners from the baseline on a consistent basis.
Initial Grade = 8.5/10
Once I had tried all four frames, I got my hitting partner (a stronger 4.5-5.0 player like myself) to play 3 super tiebreaks against me.
In the first, I played with the Babolat and lost 10-8. I felt like my serves and groundstrokes were a little weak, and while I had great precision on my shots, I just couldn't put the ball away as easily as I would have wanted.
In the second super tiebreak, I switched to the Tecnifibre. I won 10-7. I easily won 90% of my service points. I also served and volleyed quite successfully with this frame on a few points (including a second serve). I did spray a few groundstrokes beyond the baseline by 1-2 feet, but I was able to punish ANY short ball I got.
In the third, I decided to stick with the Tecnifibre. My hitting partner said he was going to go all out, as he hated losing. I won again 10-7. I had several service winners (2 were almost aces), and 2 really good return of serves for clean winners. Everything he threw at me I could handle with this stick.