Maybe it's just my opinion, but have you ever thought about getting a real player's racquet (nothing extreme to the point of, say a 90 sq inch frame that weighs 14 oz, but a real stick that suits most serious players) right now such as K blade 98? As an "intermediate player", I assume that you've already got a coordinated swing (compared to those starters who hit the balls with very non-standard motion). In this case, I think the benefits are:
1. Realizing that you are holding a weapon thats capable of growing with your game. Stop ever questioning things like "this shot should have worked, mabye it's the racquet that's holding me down".
2. Starting to get used to the feel of a real racquet. Who knows? Maybe it will even become the racquet for the rest of your life. Some day when you DO get better you'll probably really appreciate the fact that the racquet in your hands feel so attached to you as if it's part of your arm.
3. Forces you to play better, swing harder, use more body force (shoulder, torso, legs etc) instead of just the arm. Forget the "larger sweetspot", force yourself to hit right on THAT spot or it will send the ball fly. Forget the "8-10oz light weight" that's "effortless" to swing. Use your own strength, and if you don't have it, try to get more of it.
So exactly what defines a real player's racquet? Sometimes it's probably hard to say as some specs fall into the lines. But let's put it this way. Try to get a racquet that doesn't exceed 100 sq inch on face size (anything larger than that becomes "oversized". afaik
no real pros use oversized racquets). You'll probably find 95-100 farily easy to get used to. Try to get a racquet that weighs no less than 11oz when strung (have you ever felt a 90+mph serve or forehand hit a feather weight racquet? The feeling is NOT good!) . I find the lower 11's offers the perfect balance for most people especially those who want to switch from light weighted high powered racquets to player's racquets. Also remember strings are also very important, not just the racquets. Again seek for those that are not too "extreme" in any way but yet good for serious play. Good luck.