You have a very good chip there imo, not that many can match yours. Even if you could find a brand new 3848A352 there is no quarantee that it is as good as mine - or it could be even better. I had two of these 3848A352, and the other one was aproximatly 50-70 mhz behind this one.
In a couple of months we will have i9, and maybe 32nm i7?, then the race is on again and everyone gets dealt new chips.