I bought the Agama because everyone said it's the easiest car to drive, I liked the look of it too and the track side back up at this end of the country is fantastic. If you email Nemo they'll tell you if they have people at your local clubs ?
I've seen the Xray's go and they're real good, strong but I think the parts are a little more expensive but it's all really good quality stuff.
If the diffs are shimmed wrong you can hear it, unless you have them apart though you won't know what it's like.
The guy running the prototype will be contracted to Xray ( if he's helping them test ), he will be under contract to say nice things about their cars so of course he's going to say what he has, the thing is if you gave him any RX car he'd probably place in the top 4 because he's a team driver, and that's why he's a team driver and we're not...
As I said previously ALL of these cars are great, whichever one either of us own I doubt we'd end up 3rd in the A final

The cars are not going to make very much difference to someone just starting.
The JQ is good, I've seen them go and everyone I've spoken to them about track side is happy they bought one. I like their stuff too, and their video's make me laugh. More people were running Agama at my local track so it was better to go that way.
So, get to your local track and ask too many questions, see what people are running and which chassis is most popular, come away and shorten your current shortlist. Then decide if you can afford new or if you're going to get one that's been used. Go from there. Post up what you decide on the forums so people can offer their thoughts though. I don't know if anyone else has thoughts on the JQ for Rich to make a decision from ?