It's a 75% certainty, to me anyhow, that whoever dies will either be resurrected in Season 9 or will come back in some other form. And I believe that it's a 100% certainty that, if Angel were the one to die, he would be back in Season 9, plus he would come back in a state of "All is forgiven. We all love you. Welcome back into the bosom of your friends and loved ones." He might even come back all Shanshued just so he and Buffy can go all doey eyed over each other.
So, think whatever you might want to, believe whatever you might. My money is on funeral services for the tall vampire with the Neanderthal forehead. And, it's just possible that he will take Dawn with him when he goes. Why Angel and Dawn, you might ask? Well, of all of the characters in Buffy's circle of friends, they are the only surviving ones who have never been tortured or made major sacrifices in the quelling of an apocalypse. Giles was tortured by Angelus in Season 2. Faith was stabbed and put into a coma in Season 3. Riley was captured and more or less tortured/humiliated in Season 4. Spike holds the record, having been tortured in both Seasons 5 and 7, plus undergoing the trials and torture in regaining his soul in Season 6. I consider the loss of Tara, coupled with a sense of loss so severe that it drove Willow insane as torture. That is Giles, Faith, Riley, Spike, and Willow. And, of course, Buffy dying in Season 5. That only leaves Dawn and Angel, and, truth be told, Dawn is too minor a character for her death alone to be that big of a loss, BUT, as the Key, she may be instrumental in re closing the dimensional rifts that Buffy and Angel's version of "Smashed" caused. Angel's redemption is hanging in the balance here, so I predict a double header sacrifice here, with Angel covering Dawn's back while she saves the universe.
And that leaves Buffy on this side, all bereaved and broken hearted, and Spike giving comfort, support, and a shoulder for her to lean on between seasons.
(Joss, if you're reading this, feel free to use any or all of it, no commission necessary)