Feck man I used to go to Abbey and Horsham from Birmingham, but Abbey doesn't work on my car anymore since bad times.
Like you say Pete personal preference. It matters when service, price and genuine people work on your car. I would have spent a whole heap more at Abbey but moved on, it just didn't work for me.
The only downside to Horsham is that horrible single track road with potholes, but the twisties building up to Horsham are wicked!!