James Blake's and Donald Young's racquets.
Blake's racquet has dual core construction and is very stiff (68-69RA). Stock weight is 310g, but it doesn't play well until leading up to 350g. The retail Pro One 18x20 plays much easier at lower weight.
Young's racquet has a softer feel compared to Babolat Pure Drive 2012, but not as comfortable as Donnay Formula 100.