582n. the router seems to be really sensitive and you only have to touch it and it resets
That's my experience, albeit with SNR at 3.0dB. Now running a 7800n at 3.0dB. I rebooted it yesterday with dreams of my download actually increasing (the sync did, but nothing else), and my upload magically returning to 1 Meg (it did not).
Noted the up time before reboot. 32 days and would have been longer but for wanting to reboot.
My advice to anyone on a line with long line or noise issues is to dump the 582n (keep it as a backup if you like). Fair play to it; on SNR settings of 6.0db to 21.0dB on my line it was fine (I kid you not - God only knows how an automated systems are set to leap from 3.0dB to 21dB without stepping to 6,9,12 etc).
My experience of ADSL2+ has been largely naff. Initially I had 15,000-16,000 sync, with 12-13 Meg speeds. Three to six months of tweaking, and all the big things that happened last year managed to load the system enough to thump my syncs down to 12,000-13,000 (another explanation would be welcome from Plusnet) with speeds of 9.5 to 10.5 Meg. Ok, so it's not exactly 1 Meg speeds, but that little problem doesn't highlight the amount of time one spends analysing how best to proceed; the amount of time on the phone or the amount of time not rebooting the router, if you get my meaning.
I go over the web allowance once in seven years and the domain gets locked in a trice with a pre-worded (apologetic) script that one has to send to Plusnet. Months of no luck with the speeds though.
Customer service? One star until further notice. Oh, and I repeat. Dump the 582n if on anything but a rock-solid line.