First, welcome aboard. Now to your questions.

1) I think you'll find the general consensus is that an eight yarder will look a bit more formal owing to the greater amount of fabric which in turn allows for more pleats.

2) Wool is a great choice as it usually holds pleats better. The advantage of p/v is lighter weight so it can be more comfortable in warmer weather and it is also machine washable.

3) It is great that you want to support our sponsors. I've not purchased from Rocky at USAKilts but I know those that have are very pleased with the product and service.

Best of luck on your future endeavours.