I ended up going with the AEM gauges, I liked that they had a highly rated two in one boost/ AFR gauge that runs on a well reviewed bosch wideband sensor that doesn't require open air calibration. It sounds like a lot of wideband sensors out there can be very unreliable and don't last long, or you have to take them out and recalibrate them frequently.
I decided on boost, afr, water temp and a water/meth flow gauge. I already have oil pressure on the cluster and I trust it, especially with a new pressure sending unit that Joey included in the kit!
I went back and forth on where to mount the water temp sensor, I wasn't a big fan of cutting the hose and putting in one of those adapters. After looking around a bit I came across a spot on the upper hose tube that bolts to the block. It looked like it was begging to be drilled and tapped, so that will be my project in the morning. I'll be sure to post an after pic of the install. I attached a few pics showing the location, looks like a perfect spot for a temp sensor. It's a little painful pulling the tube, I removed the alternator, then the alt. mount bracket to access the two bolts that hold it to the head. It would be a great time to replace the coolant tube and gasket if you have heavy corrosion. I had replaced it roughly 5k miles prior during HG job, it was in bad shape.
I'll be sure to post a follow up once all the gauges/sensors are installed.
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