What are very precise gauges? Specifically looking for a boost gauge that is not defi priced.

I have an old school blitz dual turbo timer that has a little digital boost gauge but I feel like it may not be accurate. The readings feel delayed. Does anyone have experience with these?

 

I just ordered a full set of VDO Vision gauges (boost, water temp and oil pressure). Received good reviews on this forum and others. VDO comes stock on many high end European cars, including Porsche, so I figured they're good enough for my setup.

Egauges.com has a great selection of these gauges and others for good prices.