I saw Roxy on their 2001 tour in NYC. They were fantastic & much more interesting than the touring version in 1983 (the Avalon tour). Several songs from that show stand out for me: Ladytron, Mother of Pearl, Out of the Blue to name a few of them. I HATED what they did to My Only Love. On balance is was a great experience that I would not have missed for the world.
The High Road was another initial Roxy purchase for me. My wife loves both the version of Like A Hurricane & the version of a Ferry solo tune, Can't Let Go.
As for Manifesto, if you could make one album side of Manifesto, Dance Away, Still Falls the Rain, Stronger Through the Years & Spin Me Round it would qualify as their greatest work ever. From start to finish though, Siren kicks Manifesto's butt. Whirlwind & Nightengale are two tracks I cannot live without.
Roxy is actaully in the midst of a 3 year project of recording a new disc. We'll see. Ferry, Manzanera and Mackay keep embarking on solo projects that delay the final output.
FYI - the DVD of Ferry's 1988 tour is now out. There were some fantastic moments during those shows (e.g. Casanova, Kiss & Tell, The Chosen Ones).