As I understand it, though I'm happy to be corrected, when the websites in question award a product reference status, it means reference status full stop. There's only ever one product in a particular category (i.e. all TVs, all BDPs, or whatever else) listed as reference status at any one time.
If there was a £1,500 BDP that was demonstrably the best available and offered a significant upgrade over less expensive players, I'd agree that it would be worth recommending as part of a very high end system (a high end projector would be a prerequisite). But we're dealing in hypotheticals here, and the poster contemplating spending £1,500 on a BDP is looking to buy at this particular moment, in the real world.
On that basis, I stand by my advice... It's certainly not worth spending that kind of money on a BDP. If I qualify that statement with the words "right now," perhaps we can find some common ground.
That said, I'm not convinced a £1,500 BDP that blows current high end players out of the water will ever exist. In my view, the law of diminishing returns is greater on BDPs that other AV equipment (I'm not talking digital cables here, as I don't want to start that debate on an already heated thread). I consequently still think the poster contemplating such a purchase would get better value upgrading other kit.