265/40 is 30.34" diameter. 285/35 is 29.75". I would run 285/35 on a 10" or 10.5" wheel. 305/35 looks good on a 10.5", but in the front it would be a little fat on a 10" wheel. And it might rub since the front doesn't have the room of the rear. You could of course run 295/35 and 305/35 combo, but good luck finding those sizes. I don't think any manufacturer makes both.
I've run 285-295-305/35 on a 10.5" wheel. 285 looks decent, but is a little stretched depending on tire brand (I had Toyo's which run small). 295 fits very well and is what I have right now (Yokohama Advans). 305's look great and beefy, but if your offset is aggressive you'll rub because it's taller. I had Pirelli Scorpions which run large as well.
You'll find the most brands in 285, it's pretty standard.