Good topic actually. Here's the thing. Because PianoTEQ is a modeled piano, but a very fine one at that. And because the fx section is the least of my cares when it comes to PianoTEQ (of course it's great for economy so at least it's sticking to the theme), I use one of three reverb types with PianoTEQ depending on what I'm doing.
I like PianoTEQ so much to me it's worth the effort.
1) To get a slightly more realistic soundboard and lid sound I frequent use convolution reverb loaded with the resonance of a real concert grand, combined with an eq based IR and then if needed I'll use a secondary room IR to get the impression of a real piano in a real room.
2) I also think Aether is a good reverb for PianoTEQ. It can do what I described above but has the ability to add some great color in the early reflections, then add a ton of late reflection which makes PianoTEQ a great ambient piano.
3) Sometimes, for practice, I'll try staging, eq'ing and adding various layers of convolution reverb to get PianoTEQ to sound like I'm sitting on the 15th row at a Piano Concerto.
With the right touch using something like MIR or VSS can be a lot of fun but it's harder than to get right than it might seem.
I could name reverbs for days that I've tried PianoTEQ with but at the end of the day don't forget to play with the built in mic emulation. That's a lot of fun right there. Convocation works well for jazz and concert style, while algorithmic is better for simmer, dazzle, pop or for any classic sound from the past 40 years.
Regards,
Steve Steele
stevesteele.com
Music theorist, composer, Vienna Ensemble Pro templates, YouTube channel (Mains: 2 Mac Pros, Digital Performer, Vienna Ensemble Pro, and an iPad Pro.)