If you are looking for the best, regardless of price, it is probably the ASUS RT-AC68U that was released recently. See the 9-page dd-wrt thread on it here: http://www.dd-wrt.com/phpBB2/viewtopic.php?t=177612&sid=8bfd... which shows a few issues here and there, but that is typical of newly released models. You did say you were looking for recent ones.

If you don't have 802.11ac-capable devices and just want a cheap solid dd-wrt box, I would suggest the Asus RT-N16 or RT-N66U. The thing to look for is the amount of ram in these things. An 8M router is going to suck at running dd-wrt. See the big huge table here:

http://www.dd-wrt.com/wiki/index.php/Supported_Devices

And pay attention to the ram column.