I would not recommend a scale plane as a second plane-

The Super Sportster looks forgiving (seen it fly but not flown it myself-)

The Spectrum is a basic pattern design- should go where you point it but will likely be fastest of those you mentioned-

The Giles is an Aerobatic design, would be the hardest to fly of those mentioned-

Not familiar with the Voyager- price looks good though-

If you are still considering other planes:

Sig Somethin' Extra
Magic Extra
Sig 4* 40

Have fun!