If you're modding, the wideband because you want to know if you're going lean and can back off the throttle and maybe save your engine. I like the boost gauge cause it tells you more accurately what's happening vac/boost than the dummy boost in DIC. Oil pressure is ok, but if you see it drop to zero and are at high rev, by the time you react, stop and kill engine the damage will already be done. If you're lucky you're at a stop light and can kill engine and save any damage. Aeroforce Interceptor is the gauge everyone swears by because it reads the PCM and you set it what you want it to display, can display multiple readings. Personally, I have wideband, vac/boost & volt gauge until I install my oil gauge and use Bluetooth OBDII adapter with Android app for reading KR when just cruising. You can wait and watch the sale threads here and pick up used gauges 1/2 price, or get them new anywhere auto parts are sold. Try the vendors listed here, ZZP, Wbody store, summit racing, etc. : )