The V4's will drive the Meadowlarks without any problem. I have never listened to the V4's on the Nighthawks, but did listen to the V4's extensively on the Meadowlark line before the went to their current line. ( Re: Kestrel, Shearwater, Heron ) I am told the new-upgraded Meadowlark line sounds a little different from the previous. The latter of the two lines were very tube friendly. Meadowlark speakers ( the old anyway ) drew me into the music like few speakers could.
The V4's are excellent amps, and definitely underrated. Mike Sanders ( WWW.QUICKSILVERAUDIO.COM owner ) is quite friendly, knowledgeable, and has a straight forward attitude about what a amp should do. Of course his amps are all hand made, point to point wiring. No circuit boards to go bad. I ran just about every type ( 6550, KT88, EL34, 6L6, 5881, 12BH7, 12FQ7, ) I could get my hands on. These are very vestal amps!
You didn't mention your preamp, but I'm assuming it will be at comparable price point? Also you will find the V4's will seem to effortlessly supply power to the Meadowlark's. I hope you have a big room :)
If you told me you would buy me any pair of mono block amps @ the $4000 price point. I wouldn't hesitate to find the nearest Quicksilver dealer. Also if there is no Quicksilver dealer in your area, you can buy direct from Quicksilver. If you don't like the amps Mike will take them back, less shipping of course. At least that was what I was told a couple of years ago.
Happy Holidays! Cheers!