hmmm.. I'm not sure why this has not gotten any response. My apologizes for a late reply and I hope this offers some insight.
my2cents... The New River is a fantastic synthetic option for an UQ- I freaking love mine. Note that it is synthetic and it does not pack down like a down UQ. If you are worried about keeping down dry and want a synthetic I don't think you will find a better deal for the money. I usually pack mine loose, filling in the gaps of my pack.
However...Paul has recently opened up the flamethrower series which are his down quilts and most of them are under $200. If I was going to go with a new underquilt, (and I'm seriously eying one of these bad boys) I'd definitely go with one for the flamethrowers.