Tony's solo albums are a bit hit or miss for me. My favorite is still A Curious Feeling, which is late 70's and uses a lot of the same patches as on Wind & Wuthering and And Then There Were Three. This can be both good and bad, as the sounds are admittedly dated, but since I first started listening to Genesis around that time, I'm okay with the sounds. There are both songs and instrumentals; I usually just listen to the instrumentals.
He's had a few bands that were clearly "his" side projects, such as Bankstatement (the title kinda gives it away) that I didn't really care for, and also solo albums such as The Fugitive which isn't too bad, except he decided to sing on this one and he's just not a very good singer. Previous solo works and side projects always featured other singers.
Another one worthing checking out is Strictly Inc., which features Jack Hues, the singer from Wang Chung. The songs are good, Hues has a cool voice, and the closing track is a 17-minute prog tune that could easily have been a lost Genesis epic. Now that I think about it, Strictly Inc. might be my favorite, just edging out A Curious Feeling.
Also, he recorded an instrumental album with a small chamber orchestra called Seven. It's neo-Classical stuff or whatever you want to call it, and very good. All those cool chord changes and modulation tricks that early and mid-Genesis were known for were Tony's doing, and he gets to orchestrate it here. In fact, some of it sounds so much like Genesis, that after a change or two, I expect to hear Phil Collins start singing.