Second for XRAY here, you can't go wrong but the kits are on the higher end of the price spectrum so just be prepared for that.

A great kit to look at is the 3Racing Cero series. We have a couple guys at the track running the Ultra and they are very competitive. Great value for that kit, seems to be tough to find now though.

I also run an XPRESS XQ2S, and I sadly would not recommend that kit unless you are prepared to spend quite a bit on upgrades, which I did but wasn't expecting to have to do as much as I did. For the money I spent on that car I could have just started with a better platform from the jump and saved the time.