I definitely don't listen to enough dubstep (yet), so the only stuff I could recommend there is probably so mainstream it would get me flamed by the purists, but as for DnB...I dunno what sort of flavours of DnB you prefer, so this is something of a mixed bag of stuff I've been feeling of late:
Liquid:
Future Prophecies - September << I put this first as I've only just discovered these guys myself...and can't believe what I've been missing out on.
High Contrast - Basement Track (Upstairs Downstairs Remix)DJ Marky & XRS - LK (It's The Way).
London Elektricity - Just One Second (Apex Remix)DC Breaks - Picket Line << definitely my favourite liquid tune...ever
Logistics - The TripOther producers to check out: Brookes Brothers, Danny Byrd, Calibre
Neurofunk:
Ed Rush & Optical - ChubrubSpor - AztecNoisia - DiplodocusBlack Sun Empire - VoltageCulture Shock - MachineJump up/dancefloor:
Ram Trilogy - Screamer VIPEbony Dubsters - Ra << good track though slightly confusing to mix at first as the intro is like 1.25 phrases long
DJ Hazard - Machete << ...most people just drop this track out of nowhere which isn't too bad, but wears a bit thin when near enough everyone that plays it does it.
Sub Focus - Let the Story BeginTC - Where's My Money << quite a good "transition" tune, if you're trying to mix from DnB into dubstep relatively seamlessly, dropping the Caspa remix works well
Jungle (basically the forefather of DnB as we know it):
Adam F - CirclesShy FX - Original NuttahCan't really find many decent videos on Youtube, but DJ Hype is definitely one to check out.
Haven't gone over techstep although it's basically the precursor of Neurofunk, tends to be a bit darker - although not as dark as Hardstep & Darkstep, which I haven't gone over because I don't listen to - for the simple reason that, aside from one or two tracks by Limewax, I don't like any of it!
Apologies for the brevity towards the end, I'm absolutely chinstrapped atm so just looking forward to going to bed. I'm aware that a fair bit of what I posted is quite mainstream, but I think if you're just getting into the genre it helps to listen to the more accessible stuff and get a feel for it, before you throw yourself into more off-the-wall music.