I've been reading a lot about Project Magenta gauges, so I downloaded their GA IFR demo. There's no doubt about it, they are gorgeous.
Knowing they were pricey I contacted them for a price list, and sure enough you're looking at around £120 for one set of gauges. I'll try to post the price list for those who are interested.
I also looked at RealityXP gauges. These are very nice as well, and at about £25 far more reasonably priced. My only concern was the lack of engine gauges.
I plan to build 2 custom panels, one for single engine piston and one for multi-engine (and eventually jets as well), plus glass cockpit versions.
Ideally these panels would include all the engine gauges, Ts & Ps etc. It may be that RealityXP does include these (Project Magenta do), but I couldn't easily see from the demo and their site, so I'll put it on hold until I have time to contact them.
In the end I plumped for FS Panel Studio. I checked out the demo and then just bought it. At £16 it seemed a bargain, and everything I read agrees it's a must have tool.