Yes both finales were very well done, with the Angel finale being my favorite finale of all time. The final battle in Buffy isn't what I really care for in that episode, it's good but not fantastic. For all the long time fans, I really love how they did the ol scooby gang banter with the original four members. The final cut with the gang and Buffy looking out over a devastated Sunnydale is fantastic too.
Oh my god, the Angel finale had me stunned and amazed for so long. Compared to how the best season of many tv shows is early on, I loved how Angel just got progressively better and better and that all culminated in such a powerful finale. How each character spent his/her last day on Earth and each individual fight, it was all spectacular. Just some of my favorite scenes that come to mind; Wesley dying in Fred/Illyria's arms, Lorne killing Lindsay (Lindsay's final lines were EPIC!!!), and of course the final alley scene where our champions make their last stand.
Season five of Angel is just too good for words.