35-80hz is really not considered midbass, but that is fine. Setting a speaker to small does not "cut off" at that frequency, there is a gradual slope or hand off to the sub. My 80's are set to small with a 60hz crossover, allowing the sub to do what it does best, move more air with the larger driver.
Ghost, where are the VP150 tweeters in relationship to your ears? Have you tried flipping the VP150 over to make use of the angled side, which might aim it upward to your ears? In reality, the tweeters of your left/center/main should be as close to ear level, when seated, as possible. Have you calibrated all the speakers to the same SPL, normally 75dB's?
I tried posting pics in the gallery but ill have to do it from my PC upstairs later. My 150 sits about 18" off the ground under my screen. The 60s are at ear level. I did the Yamaha auto calibration and it was almost spot on to my own tweaking. In regards to the dB level they're sitting at I have no idea. Should I lower the crossover to 60 and see how that sounds ?
