I have the Caldera SCT. It's a bit short on the wheelbase but is longer than the Blackout. I think it's listed at 305mm for the wheelbase but you can adjust the spacers on the hub carriers to get the wheelbase to at least 307mm. The stock caldera body is pretty good and a few other SC bodies...
I've also been pleasantly surprised by Redcat Racing RC vehicles. I find them way better than some of the bad reports that I read online about them. I currently have the Caldera and it's held up really well. The Caldera looks pretty similar to a Tekno with beefy parts and performs very good...