Sounds like a plan. I agree completely regardingthe problem of blending woofer/tweeter nearfield. Vinnie can customize the input sensitivity so that the volume control is in a more workable range for you. You're probably right regarding low volume performance, but if your price range is under $1000 USD, nothing under 10 wpc will touch the Clari-T IMO. I've heard several SETs and none have the bass output, push pull tubes have loose/undampened bass, and Class A solid state start at $1300 (Cayin 265 and it's huge/hot).
BTW, most audiophiles I know keep it under 85 dB on average, so with the Omega speakers you'd be averaging less than 0.1 wpc RMS. The killer is in the volume peaks. Live classical peaks can (very rarely) hit 105 dB, jazz about 100 dB, rock around 110 dB. A 6 wpc amp (Clari-T) adds 8 dB of gain, nearfield stereo adds 3 dB, extreme nearfield stereo(computer monitors) can add 6 dB, large room stereo (greater than 3,000 cu. ft) cost 3 dB. (Stereo by itself adds 3 dB.) You can do the math.
Note that the Grande 6/8 have a warmer/slower presentation than the Omega "3" series and wouldn't seem to blend as well with a sub. Except for the original TS3, none are "mini" monitors. Don't know about the newer offerings. I for one am a big single driver fan, but have reservations regarding whizzer cones, like the Grande 6/8 use. Have you considered the Clari-T/Mini-Me combo?
Public service announcement:
Extended exposure to 85 dB or higher sound pressure levels will result in permanent hearing loss and possible permanent pain.