Not much on DVD-A as there is SACD. In the States, it's the other way round; DVD-A was the preferred hi-res format a couple of years ago. Unfortunately, it's all academic now, the lack of support, effective marketing and titles released on either format reduced it to a niche consumer group purchase.
Perversely, there are more and more players coming out now with SACD capability and a handful of universal players can take the main hi-res formats (SACD / DVD-A & HDCD). Cheapest is the Oppo-980 (£160 delivered), but more typically, expect to pay circa £800 upwards to get all three. You might get a deal on some Arcam or NAD gear now they've been out for a while and likewise the Denon DVD3930.
Market trend post-CD is towards the iPod / iTunes computer based format, but there isn't exactly a dearth of hardware on either the CD or vinyl market; the latter enjoying a mini-renaissance after the dark years of the early to mid-90s. Excellent players in both formats are available from budget prices - as little as £130 will get you up and running (less if you consider brands like Tangent) - and the sky's the limit at the other end of the scale.
If hi-res is your thing, check sacd.net, or simply go to Ebay and enter SACD or DVD-A to get a list of titles, often at very reasonable prices. I picked up a few albums from the States at less than I'd have paid in the UK and this included P&P! Billy Joel's "The Stranger" SACD album was about £8 all in, if that and it sounds superb.
Would I buy another hi-res CD player? Definitely. There are enough SACD titles out there to warrant it. DVD-A is another matter, but some can be found (the Talking Heads recent reissues were in DVD-A for instance).