VT-100 MKII sonics but need more power


I am looking for a tube amp that has the sonics of the Audio Research VT-100 MKII but with more power say 150 wpc. I would prefer a stereo amp also, but all suggestions welcome. I am putting together a system for a friend with Alon 4 speakers and they have a 12" woofer. I want to have a nice full mid range with sweet highs and control the woofer with a tube amp for now.

I have heard that the VT-200 does not as good sounding as the VT-100 from a close friend who had both.

Thanks for your suggestions and Happy Listening.
bigkidz
Hi Big....I agree 100% with mejames. The VTL is outstanding! I had (and still have ) the 100 mk11. However, I purchased the ASL Hurricanes and I am very satisfied. Have you seen my review?
Yes guys I get the picture but I am really looking for a stereo amp if possible so I need some amp suggestions there other wise I have to move the entire system around.

Thanks.
It sort of gets hard to build a stereo tube amp at around 200 wpc because it just gets too large. You need a large, heavy power supply and output tgransformers, so at above 100 wpc you will start seeing more monoblock designs.
It's been a while since I verified the power rating of the VT-100, so I trust that it is 100 wpc (as the name suggests). If that's correct, then you need to amend your thinking about moving from 100 wpc to 150 wpc, because that is only a 1.5 dB increase in power. Generally speaking, you need to double the amount of amplifier power (a 3 dB increase) to be able to hear any real difference in sound pressure level. Hence, you'll need to go from 100 wpc to at least 200 wpc, particularly if your speakers are of average efficiency (in the 86-88 db range). If you have very inefficient speakers (around 83-84 db, or lower), you may even need a 6dB increase (or 4 times more power than the original amp).

As noted above, when you start moving into high-power tube amps, you are also moving into high-cost territory, and usually monoblock designs. If you really like the sound of your VT-100 amp, it might make more sense to look for different speakers with high efficiency -- say, 90 dB or higher. Just remember that for every 3dB increase in speaker efficiency, you can reduce by half the amplifier power needed for a given sound pressure level. If you get speakers that are 6dB more efficient than your current pair, you will only need one-fourth the amplifier power to drive them to comparable volume levels.