Just watched the remastered version of Gundam F91 last night and it's pretty breathtaking at time.
Spoiler for Here's one of the more action filled scenes redone in 1080p:
2011 20th anniversary remaster
Original 1991 release
The 2nd video syncs up around 1:40
Not gonna say it's the most beautiful anime, but it's kind of stuck in my mind right now.