I think it all depends on the type of driving you plan to be doing. I really like a round rim for rally racing, and anything that requires quite a bit of slip angle while working an H-pattern (90s DTM, Vintage racing of practically all sorts, etc). For modern day GT racing, V8 Supercars, etc - I prefer using a D shape rim that I believe to be about 320-330mm. I'm a huge fan of the universal hub because I can adjust the button clusters to (almost) exactly where I want them. I use the Uni Hub for both my round rim (350mm) and D shaped (320-330mm). If I'm driving modern open wheelers, that is when I really like to use my Mclaren rim, but I also use it for some GT3 racing. The only rim I own that I advise against buying is the Fanatec Formula series of rims. If those rims were a bit wider, like the Mclaren rim (310mm I believe), I think I'd like it a lot more. I also own the Porsche 918 rim, and while it's a damn good rim and I really like the feel to it, I like the button layout using a Uni Hub W/ round wheel for all my round wheel needs. As a result, the Porsche wheel doesn't get much use at all and is more of a display item LOL.