Sonnox Oxford Reverb. I've tried a lot of reverbs on vocals and many with good results. This is the easiest to achieve the end mix with the well laid out UI.
T-Racks White 2A
Waves Linear Phase Multiband
Nomad Factory Magnetic II
Waves H-Delay
Those are a few that I use most often on vocals. It all depends on the need at the time. The Magnetic ends up in the 2 bus and I may tweek the other plug ins going in. I may end up with more than one compressor or more than one EQ on a vocal track. It just depends. Another one, used less often is the Avox Warm. Be careful with it. A little goes a long way.
The Pro EQ in S1 is very good and I use it more than any other I have. The plug ins offered by Presonus will do pretty much anything you need but I don't think their user friendly.
The biggest improvement I ever made is with hardware. Good mics and preamp are where it's at. Save your money on plug ins, I've spent enough for a couple people. If you want good vocal tracks, record good vocal tracks.
Sorry guys but I'm not a fan of Izotope plug ins. They are a CPU hog and can cause problems.
I have tried and tried to get her to do country. She hasn't found the right song? I told her she has to listen to it to find it. She loves to sing but right now its all high school soccer.
I think it sounds pretty good. I would suggest some tube saturation. For lack of a better word it sounds crisp. Might take the edge off and give it a smoother quality.