Never thought I'd be saying this, Jimmy, because I'm a fan of the A1XVA (we used to use one as a reference deck, you might recall) - but I'm not sure I'd be buying one in the current climate. Depends on the deal you're getting, of course, and there's no disputing that it's still a great DVD player, but even so: while upscaled DVD can be persuaded to look very good indeed, as we demonstrated ourselves at our recent show, it's still a way off the best efforts of the best Blu-ray kit. Don't forget, incidentally, that Denon is about to launch its own high-end Blu-ray deck, the DVD-3800BD, which we'll be testing as soon as we can - it could turn out to be a better way to spend your cash.
Of course, you could have your heart set on the old A1XVA. If that's the case, please do bear in mind you'll need a very good display to justify it. Using the Denon via Scart with an old 32in TV is a complete waste of time and money. I'd suggest a 50in plasma from Pioneer as a minimum, and better, a projector. So that's around £2000 - £4000 to find (and the Denon is right at home with projectors costing much more, too).
As for receivers and speakers -ÿwell, it's hard to give hard and fast guidelines without some idea of your room size and preferences, but as a rough guess.at the very least, a Denon AVR-3808 receiver (£1200ish), which has a Denon Link input to accept high-quality audio direct from the DVD-A1XVA's corresponding output. Better still, an AVR-4308 (£2000) or one of the same company's AVC-series beasts (new models are on the way, while kit like the existing AVC-A11XVA will cost you around £2000).
You aren't obliged to use Denon stuff to partner the Denon DVD player, of course. But high-end receivers and amplifiers of suitable capability to partner a DVD player costing £2000 or more are rare, and Denon kit happens to fit the bill well (and by the way, in our view, you should spend more on your receiver than on your disc player).
And of course, we've still to budget for speakers. Suitable kit starts at £2000 or so for the Dali Ikon 6 5.1 package (if you're chasing optimum sound quality) or Tannoy's Arena HighLine 500 (if you want decent sound with a modicum of style). However, we shouldn't really start fixing speaker systems until we've nailed your room size, like I said.