Hi!bro
i would answer your queries one by one ..............
looking at what you have quoted that your plan is HOME 500 ........... it turns out to be that the speed you are getting is quite slow ........ and i guess you have mistakenly quoted the speeds as "kbps"

while it should be "KBps"

anyways still it is slow and yeah the attainable speeds are not 125-150 KBps but around 250 KBps

but this whole thing of speed depends on a lot of factors .......... so do check around with BSNL and complain to them about the speed problem which you are getting but i don't think BSNL's Customer care is that good for all this .........
(1).net speeds don't depend on the brand but on the hardware that the modem composes of and the bandwidth alloted to you by your ISP............. i mean the modem type which you have is fully capable of supporting speeds greater than what BSNL is currently offering ..........
(2).no wired/wireless modem doesn't make any difference as the wireless modem supplied to you supports Wifi thus the modem technology can support higher speeds than what BSNL is currently offering but there may be difference in the signal strength if in case you move away from the signal support range ......... which may cause Disconnection etc ...... maybe slow speeds as well ........... but as in your case there shouldn't be any difference .......
(3).good in performance may relate to many things like the features which the router offers , it doesn't get heated up easily , supports higher bandwidth , has a no. of connecting ports/options , doesn't suffer from frequent disconnection due to heating b'coz of continuos usage , good built quality, easy to configure ,
has online support for firmware etc. etc .........
as already listed by me that the brand of the router shouldn't make any difference in the speeds attainable depending upon various factors mentioned above ............... and for the sake of some good modem no. sry but i don't have any idea about it ......... hopefully some other forum members would guide you through it ............
and guys please do correct me if i'm wrong somewhere .............
