Not sure what you mean by "larger batches", but I brew 6 gallon batches and I use a MiniBrew 6.5gal. Conical fermenter. I think it works fine. I like having two valves (one dump valve at the bottom and a sample/transfer valve mid way up the cone). I dump the trub, and yeast every couple days, I also like taking sample to check the gravity toward the end of the fermentation. I have had no problems at all with this equipment. Cleaning it is a breeze, I fill it up with hot water and PBW, let it sit a few hours, I might use a soft cloth rag to rub any stuck on krausen, etc. I never put anything inside it that might scratch it.
I have brewed ~10 batches in it (from lagers to porters) there is no flavor transfer and no staining.
The stand for this unit is a little flimbsy, but it works fine. I normally ferment in a converted stand-up freezer, I have drilled a hole in the top next to the airlock hole to fit a thermowell for the freezer control thermostat, the plastic drilled easily and predictably with no burs. I would buy another if I ever move up to 10 or 15 gal batches. I have noticed the price has creeped up on these about ~$50 since I bought mine, but I still think they are the best conical for the money.