Ranger is exactly right, width will make no difference on your speedometer... and they should fit. I have seen that done.
Check your driver's side door sticker for the tire....it is probably an "H" rated tire.
Which means you do not need to pay extra for a "Z" rated tire....
Find a decent "H" rated tire and go with that, would be my humble opinion....Opinions really vary on tire brands, wear, softness, etc... How you drive, where you drive has a lot to do with it.
I personally have GoodYear now, and while I like the tire & the way it handles, it is wearing fast for me. BF Goodrich lasted longer, for my driving, in an ETC, 1997. Also on my truck, a 99 Tahoe LT, the Goodrich is lasting forever. 70,000 and counting.... but that's a very different tire, and a different driving style, probably not fair to compare.
Just my humble opinion....you will doubtlessly find other opinions out there. My opinion, and $5, will get you a cup of coffee at Starbucks.... take it for what it's worth.