TP-Link Routers

Currently my most favourite choice of router for DD-WRT !! Some key reasons:

Atheros base - currently the most popular & market leader!
Good platform features, frequent new product launch & improvement.
The stock firmware is quite comprehensive & stable.
Currently one of the most popular brand supported by DD-WRT, able to flash from low-end draft-N like the TL-WR741ND right up to high-end Gigabit 3x3 MIMO like the TL-WR1043ND.
Easy to flash DD-WRT through web gui, also easy to find web revert file for flashing back to original stock firmware.
The cheapest & most affordable in the market!

Devices supported by DD-WRT as of 8May2011 r16994 build: