The A-Class Mercs were best for drifting, but never had a massive following due to the handbrake having to be operated by the drivers right hand.

To be honest though, for field drifting I'm sure mercs would be grand. Spares would be pricey. Mercs are generally pretty damn heavy if I remember rightly and so if you were looking at a merc to use in a field, get something with a bigger engine otherwise you'll be half the day getting up to speed