MTNL delhi - ADSL modem router choice- 3 Options

Hi,

I want to upgrade my old ADSL wireless modem + Router as it has only WEP. I need one with good coverage. I have complied a list of three router. Would love your suggestions or experience with these.

Dlink DSL-2730U Wireless N 150 ADSL2+ Modem Router
2450/- ebay
Dual Antennas

TP-link 150Mbps Wireless N ADSL2+ Modem RouterTD-W8951ND
2350/- ebay
3dbi omni-directional Antenna (single)

iBall ibaton 150M Wireless-N ADSL2+ Router
2339/- ebay
5dBi omni-directional Antenna (Single)

Sorry I had to remove URLs along with model because I need 15 ******* post to include URLs. I understand the reason though.

Atul

SECURITY ONLY WEP key available.
1.
Mention model /make/number of old Adsl modem+wifi router.
2.
MAC address white list or blacklist option available in above. ?

UPDATE OPTIONS:
3.
If working OK stand alone wifi router saves money.
4.
Select model with WDS/WDM wireless bridge option.
5.
Select Antenna gain 5 dBi model TP link model 8901G has this recheck. .
6.
Dlink DSL2530U (same as Old WA3002_g4 group see below )
check wds/wdm or wireless bridge option may be available.
7.
If planning to buy USB data card or USB 3g modem consider
costlier 3G wifi routers.

Friend , TP-link 150Mbps Wireless N ADSL2+ Modem
RouterTD-W8951ND price of this modem+router is just 2000 rs , dont buy from ebay , check bitfang.com