Well I got my hand on a Draytek 2862 modem... long story short, this modem is a beast. Literally it's the best thing I've ever owned.
My other D-Link / TP-Link/ Thomson and Cisco modems were syncing at 14-16Mbps max with SNR tweak and with sporadic disconnections.
I've been online since 24 hours and here's my results :

DrayTek> adsl status
--------------------------- ATU-R Info (hw: annex A, f/w: annex A) -----------
Running Mode : ADSL2+ Annex A State : SHOWTIME
DS Actual Rate : 19485000 bps US Actual Rate : 928000 bps
DS Attainable Rate : 19624000 bps US Attainable Rate : 960000 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 23 dB Cur SNR Margin : 6 dB
DS actual PSD : 20. 2 dB US actual PSD : 1. 4 dB
NE Rcvd Cells : 626221 NE Xmitted Cells : 16083
NE CRC Count : 3 FE CRC Count : 1
NE ES Count : 3 FE ES Count : 1
Xdsl Reset Times : 0 Xdsl Link Times : 3
ITU Version[0] : 00000000 ITU Version[1] : 00000000
ADSL Firmware Version : 07-07-03-0F-00-01
Power Management Mode : DSL_G997_PMS_L0
Test Mode : DISABLE
-------------------------------- ATU-C Info ---------------------------------
Far Current Attenuation : 12 dB Far SNR Margin : 10 dB
CO ITU Version[0] : ffb54753 CO ITU Version[1] : 504e0010
DSLAM CHIPSET VENDOR : < IKANOS >
DrayTek>
My other D-Link / TP-Link/ Thomson and Cisco modems were syncing at 14-16Mbps max with SNR tweak and with sporadic disconnections.
I've been online since 24 hours and here's my results :

DrayTek> adsl status
--------------------------- ATU-R Info (hw: annex A, f/w: annex A) -----------
Running Mode : ADSL2+ Annex A State : SHOWTIME
DS Actual Rate : 19485000 bps US Actual Rate : 928000 bps
DS Attainable Rate : 19624000 bps US Attainable Rate : 960000 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 23 dB Cur SNR Margin : 6 dB
DS actual PSD : 20. 2 dB US actual PSD : 1. 4 dB
NE Rcvd Cells : 626221 NE Xmitted Cells : 16083
NE CRC Count : 3 FE CRC Count : 1
NE ES Count : 3 FE ES Count : 1
Xdsl Reset Times : 0 Xdsl Link Times : 3
ITU Version[0] : 00000000 ITU Version[1] : 00000000
ADSL Firmware Version : 07-07-03-0F-00-01
Power Management Mode : DSL_G997_PMS_L0
Test Mode : DISABLE
-------------------------------- ATU-C Info ---------------------------------
Far Current Attenuation : 12 dB Far SNR Margin : 10 dB
CO ITU Version[0] : ffb54753 CO ITU Version[1] : 504e0010
DSLAM CHIPSET VENDOR : < IKANOS >
DrayTek>