so i am guessing you want an unlimited connection.
landline is good for you. both airtel and bsnl have something for you.
Reliance would be expensive but good for your gaming son.
Not really getting an idea from your post. you have many things in your mind.
1. you can take a landline bb connection of varying speeds depending kind of money you can spend.
2. you can take a 2G bsnl sim and work it on an unlocked modem and get 150+ kbps speeds.(sorry not aware of situations about bsnl u.p east- edge was working fine when i was recently in lucknow though but didnt checked with 3G modem there)
3. you can take any 2G internet from docomo, airtel, bsnl, idea etc.. they are all giving some ~2Gb on 90-100/- range.. but the speed would be max 10KBps.
4. you can take an expensive Reliance connection but i am not aware of support in Lucknow. you can use your cdma reliance as an internet connection, ask them for any Unlimited kind of pack.. usually they charge 60 paisa day - 40 paisa night as default which is not good.
so untill and unless you give a clear idea about what you want, i can just confuse you evermore..
hey forgot to mention evdo..