I've got three DNA mods, a 75, a 200, and a 250, and haven't any problems out of them. Given the problems that have been reported lately about evolv chips I'm sure it's partially due to luck, but I've got no complaints. The performance is top notch, and if you do have problems you have a full warranty and great customer service.
I've never used a high end Yihi chip, but I've got a G Class on the way so we'll see how it compares.
The FSK board deserves a mention. It's a great performer all around, but the thing I love about it is how smooth the TC is with contact coils. I can get similar results with the DNA but it's takes a fair amount of tweaking.
Edit: Also, as far as custom mods go, I love the Boss 3000. It's definitely overpriced but that doesn't mean it's a shitty mod by any means. I don't regret getting mine.