I concur on Xray. They are WELL worth the money if you can afford it. I drive like complete crap, and I have yet to break any chassis parts except a front shock shaft. That was my own fault....who knew that if you landed smack into a 2X4 brace off a big jump...stuff would break? hehe
I converted an XRay XB8 Buggy to Brushless a few months back, then decided to get a purpose built electric and bought an OFNA Ultra LX-1e off a local here. I'm not too happy with it....mainly because I'm used to XRay's quality. I mean it's far from a PoS Buggy (the OFNA), but it's VERY far off from being an XRay as well.
I think in the order of which manufacturer I would buy first it would be: XRay, Mugen, Losi, Jammin/OFNA, Associated, and then everyone else....