お教室 or 教室, which one is better?

[markits]

Hello,
I have some confusions about the usage of お, which seems frequently attached in front of a noun. Could anyone tell me which of the following are better option for domain name purpose?
お教室 vs 教室
お問い合わせ vs 問い合わせ

Google trends shows that the term without お usually is more popular. Should I always get rid of the お in domain names?

Thanks.
お問い合わせ vs 問い合わせ
http://img87.imageshack.us/img87/7025/contactug9.png

[websjapan]

this is a humble form that makes the noun polite - used a lot in shops and formal letters etc.

there is another one ご WHICH IS used for the same reason

there is no system to it, its just one of those things

i dont think people will be searching much using this as its only used when addressing a person higher than you (customer, boss etc).

[markits]

Thanks websjapan,
I have just picked up 問い合わせ.com, google shows 269 millions pages. Do you think it is an OK domain to keep?