4th Gen at 417kMiles. Suspension advise.

Hey guys, i just bought my first 4runner and i am in love with this thing! 2007 SR5 Sport Edition, 417.000 miles, 1 owner and the thing still drive amazing! I don't know much about upgrade but i been doing some research in the forum, i am looking to install Blistein 5100, i believe that i have the Xreas suspension which can cause some compatibility issues? which kit will be my best option? Not planing to do any off road any time soon, but since i am planning to update wheels and tires, i better upgrade the suspension at the same time, shall i replace the coils or use the stock ones? Any advice will be welcome.