you're not going to find too many (if any at all) that will give you a DMR performance out of the box on a beginner's budget.
I'd look into a good quality gun that will take to upgrades without breaking the bank right off the bat. M16/M4 variants are pretty much the most common (along with ak's and g36's)... so you will find more people that can give first-hand advice about them.
EBR's tend to have a really weird way of connecting the grip/stock to the receivers... and it's one super tiny screw at a weird angle that makes it kind of a weak spot. So if you plan on not spending your games doing everything in your power to not trip/fall onto your gun... maybe start with something a little stronger body-wise IMO.
G&G combat machines are cheap mid-length M4's... and very good guns out of the box. accurate and decent rof... they're also pretty tough inside and out.
Dboys AK's are pretty good... I have one for sale, by the way
, but the gearboxes sometimes come completely full of grease... or completely lacking it, and they have pretty inconsistent inner barrels stock (you might get an amazing one, you might get a crap one)
I've heard a lot about the G&P's... but I don't have any first-hand experience.
If you have a little more on the budget side of life, then KWA's are great. Easily the furthest shooting stock guns I have ever seen. They also have very good quality control and I've never seen one that didn't come out of the box shooting like most mildly-upgraded guns (hard, accurate, high rof, quality shimming and overall just a very nice construction). I don't recommend starting out with a KWA... it's easy to get spoiled, and it might end up that you don't like the sport (but that's only if you're crazy... or less crazy than us... you get what I'm sayin).