[sperry]

I'm partial to the Defi line (boost, water temp, oil temp, oil pressure, egt in the race car). But they're kinda screaming expensive. And for just one gauge, they're over kill. And in retrospect, for the race car they're too flashy and hard to read in bright daylight under race conditions (they're the BF series). But they're awesome in a street car. In my outback I went with the sti genome legacy gauges which are made by defi.

Keep in mind though, virtually none of the gauge manufacturers out there make an A/F gauge worth a damn because they're not wideband. I wouldn't bother with any A/F gauge other than an Innovate. And their gauges aren't likely to exactly match whatever boost gauge you pick. I've got an innovate lc1 with a plain digital display in the race car.

One brand many people overlook is ISSPro. They make high quality gauges popular with the truck crowd. I have a boost/Egt/tranny temp setup in my truck. The match the stock ford gauges very well. And would actually match the stock rs/WRX gauges too I imagine. Plus they're not bank breaking, and you still get full sweep electric gauges.