yeah, the UA pres are nice but you have to watch the gain on them kase ang headroom is not very high, the (Avalon) 737sp has a bit higher headroom by comparison. On the plus side, the coloration of the signal especially if you run the resulting signal through an LA or some kind of tube comp, the sound is very warm, parang in-your face talaga. I don't own a Grace pre pero I know it is very clean from having used the 201 before. If you want a clean - very clean - sound to make dry recordings with, the Grace is the way to go. It is priced very competitively too.