I am looking at getting a boost gauge and I am mostly looking at SPI's. I heard they are aircraft quality and are pretty good, much better than autometer. Ive also heard Defi and Osami (sp??) are really good but pricey. Also, what is the difference between electronic and mechanical? Which is more accurate? Any help would be much appreciated for my soon to be T2. Thanks in advance to all the people willing to help me find a good quality, affordable boost gauge.