Perth.
It's OCTA so no ATC delays. Airspace is easier because it's not as complex/crowded.
Dundee is just over the hill.
The airway to Aberdeen is overhead.
Glasgow & Edinburgh not far away.
Examiner on the field.
Accommodation & meals on the field.
I & others were very hapy with our treatment at Tayflight. Their Seneca II is nicely equipped & well looked after. They also have a sim. trainer to reduce costs.