If you are looking for a Pioneer unit to compare to the Yammie 2500, you should look at the Elite VSX-54tx. You can get the 54 from elegantaudiovideo.com less than $675 shipped, with the 2 year warranty. The 1015 has more digital inputs, so if that is a big priority, stick with that one; however, the 54 does zone 2, uses larger capacitors, and other things that go with the elite line.
For me, it would be a bit of a toss up between the 2500 and the 54, when I made my choice I went with the 54 and I am very happy with that choice! If I were choosing between the 2500 and the 1015, I would choose the 2500.