There are dozens of threads where your question is already discussed to boredom. GoDaddy is the cheaper with info domains but IN domains are cheaper at Dynadot and Name.com
I got the domains for more cheaper rates and 1 GB Webspace free from DomainHouse.in there is a comparison chart also on DomainHouse.in . I think you can go through that.
I love godaddy for all my domains. I never test outside this company but i hope there's lot more that can be cheap.
There are a lot of domain name registrars which offer discounts for their coupon codes. Do the search for them and you will be able to find some really cheap offers
Gossimer offers cheap domains and current has a promotion if you would like to consolidate your domains in one easy to use account with Gossimer. The current promotion allows customers to transfer-In as many domains as they would like at $8.59 per domain (.Com/.Net) and it will add one year onto the registration. They have a new promotion starting 1 July 10 which they are going to drop the transfer-In price again, they will be offering them for $7.50 per domain, also adding 1 year to the registration. At a time in this industry when all other registrars are raising prices because of the increase in ICANN fees, Gossimer is lowering the prices. Gossimer also does not advertise one price and then add on different fees, the price you see is the price you get with Gossimer, nothing is hidden.
Nothing is cheap and every thing is cheap The thing needed to transfer nothing to everything is the DOMAIN NAMES COUPONS CODES !