I'd highly recommend the Prosport Stepper Gauges.....
They were only £97 for all 3 gauges from
XyberAutos, which is probably cheaper than ONE defi gauge lol. The pod wasn't included in that price, I got that from scoobyworld and it was about £70. I mean I don't know how accurate they are in comparrison to defis etc, but they certainly seem to do the job! They're also pretty good lookin gauges considering their price. Most of the cheaper ones look horrible!! They seem to do quite a lot aswell - They can store peak values which you can then look at, give you a visual and audible warning when each gauge reaches a value that you can set, etc.
Sorry I'm rambling now lol. They get my vote anyway