You will have issues. It doesn't make sense to run the same offsets on both front and rear. Look at the stock offsets already provided on page 1 of this thread (post #4). The front offset is +47, and the rear is +30. Using a front wheel with an offset of +25 means that you'd be pushing the fronts out by 22 mm! They'd stick out and give you what I call the 'skateboard effect'. Now, +25 would work just fine for the rear, because you'd only be pushing it out by 5mm. If anything, I'd be inclined to go for a +20 offset on the rear to push the wheels out by 10mm.
As for the tire sizes, the important thing is to try to keep the overall diameter of the tires as constant as possible, because your speedometer is calibrated based on the tires' OD. You can look up the OD of the stock tires at Bridgestone's website. Here's a direct link.
Sizes and Specifications
Now what you need to do is look up those tire sizes you want at the website of the manufacturer (you didn't specify the make) and compare the OD. If they're reasonably close, they'll work. If not, then no.
Let's just say, as a hypothetical, that you intend to use the exact same brand/make of tire, just different sizes. Well, the chart shows that the stock rears (275/35-19) have an OD of 26.5. On that same table, it shows that the OD of 285/35-19 is . . . it doesn't even show such a size on the table. So you can't even get that size, at least not with Bridgestone RE050s. But you get the idea. Assuming that this size does exist with some other manufacturer, you'll want to pull up the spec table and compare the OD to make sure you're not changing it too much.
OR...you can calculate it the old fashioned way. 275/35 means that the sidewall height is 35% of the 275mm width, which is 96.25 mm. 285/35 works out to 99.75 mm. So the sidewall will be 3.5mm higher. That's negligible, IMO. Repeat the same procedure for the fronts.