i like riverina pefromance center, and you know you can register more than 1 trading name with dept of fair trading, and use the same abn with more than one trading name.

So register now for abn and the trading names you want, make sure you set up the correct structure for the business. (company/partnership. sole trader etc).

then you can trade under one name now and add the other later to the same abn when you get a premisis.

so something like: wards performance and hot rod shoppe (or similar)
but id definately get the rierina one for later on as well.