Prevailing view here & in kitchens is to get the best of each category for your purposes. You've got some great choices in your sights.

The only benefit to having a one brand kitchen would be unity of style. Given how long (short, rather) appliances last these days, I would suggest putting that benefit at the bottom of the list or scratching it off all together. I don't believe that was ever much of a consideration in kitchens, unlike bathroom fixtures. There was a bit of that when colors were popular, but even there, Harvest Gold was Harvest Gold for most manufacturers. (White of different bathroom fixture brands don't even match these days.) It should be interesting to see what replaces stainless steel when it goes out of style (aren't we about due?) for the common appliance store brands. White, stainless steel and black don't encourage complete appliance replacements when one breaks since those finishes easily match new with existing.

Of course manufacturers want you to purchase a Brand 'X' kitchen, but different brands excel at different appliances.

yes, general consensus is get the best appliance that works with your application and usage and fits in ur budget..
no need to buy one brand.

one brand does not make the "best" of everything...

Good Luck!!!!

I agree with everyone else's advice, but mainly wanted to say the Bosch induction cooktop is fabulous (we have the 500 series).

I believe there are benefits:
-you can get very attractive pricing with the promotions
-you have one local and mfr. service contact which, if they're good (a key consideration in choosing a brand), can make life with the appliances much easier
-a unified look
-only one set of controls/ergonomics to learn
I did the one brand thing two years ago when building. My reasoning; the appliances I cared most about (fridge, cook top) I would have bought the brand anyway. The ones i cared least about (hood, oven, microwave) were "good enough." I would do it again.

IMO the benefits are greatest when the appliances will be next to each other, like a steam oven above a regular oven. But if they will not be you should be able to mix and match.

I don't see a reason to do it except for cost. We did all Monogram last go-around because they had a fantastic deal (and my wife gets GE corporate pricing). We are going all Thermador this time because we love their induction and refrigerators (and the package cost makes the things we don't care as much about "free", which is a nice benefit).

The only two things that I think HAVE to go together are the oven and steam oven since they are stacked in our kitchen. Everything else could be mixed and matched without care in our case except for $$ is a "care" for us so we are going package. Good luck with your choices!