My initial impressions of the VP150 - purely subjective
Ordering process:
I ordered the VP150 online on thursday, Sept 4,received confirmation of delivery on Fri Sept 5. Delivered to my door on Monday Sept 8. Axiom sent me an email that same day telling me that my centre channel was delivered to my location succesfully and if I needed any assitance in anything to conact them. Nice touch! The ordering process was fast, efficient and as painless as possible with online ordering.
Initial impression:
This thing is a huge, twice the size of my previous centre channel. It is long and slender with dimensions of 7.5" x 27.5 " x 7.5 ".
Things I have listened to: Keep in mind I only received this yesterday

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Planet Earth DVD:
The dialogue from the VP150 was clean, crisp and accurate. With my previous centre channel I noticed some nasally quality in the voice but that was gone with the VP150. The VP150 is very effiecient as well, I have no problem driving the VP150 with a Denon AVR 688 (Denon's entry level receiver) in my medium sized room. However in a big room you will need a more beefy receiver/amp which typcially the VP150 is suited for.
Dave Mathews - Bartender in DD 5.1 (Bonus DVD that comes with busted stuff)
The way the sound is mixed for this track all the bass guitar goes through the centre channel. The sound coming from the VP150 was stunning to say the least, it was extremely detailed and accurate. The bass lines coming out of the VP150 was pure ear candy

. You could feel its presence. This was the highlight for me so far

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Red Hot Chili Peppers - Easily
This song is off of their album Californication. I choose this knowing how poorly recorded this album is. I listened to this song in Dolby Pro Logic II. The bass coming from the VP150 sounded good however the vocals sounded bright, not pleasing to listen too. I had a tough time getting through the song, I would not be able to listen to the entire album.
Monday Night Football In Dolby Digital 5.1
Again the commentary sounded superb. Did not sound bright at all and dialogue blended in with the rest of the system quite nicely. So far from the little time I have had with it, the VP150 is a big step up from my previous Polk centre channel, however it should be considering it was $200 more dollars and in an entirely different class/model than the Polk. The VP100 would be a more comparable model in this case. I do not think it is a fair comparison.
Conclusion
From the very limited time I have listened to it, my initial impressions is that I have found the VP150 very clean, detailed and accurate sounding. You can really feel its presence in a smaller room. Poorly recorded/compressed music sounds bright. The VP150 is very effiecient and even the most modest recievers are capable of driving it. Placement can be a problem for soom due its physical size (its big). Even though I am not married it is safe to say it will have a low WAF factor as well. I am looking forward to spending more time with it in the upcoming week.