Affiliate Marketing Secrets

I want to buy a domain with ‘.com’ and i want my website to be fast as it will be having more than 500 pages on it.
So, i want to buy a domain with:
– larger space
– speed
– no problems on server
So, from where should i buy my domain name?
Please clear if you think that i have any misconception regarding this domain thing.
I just want to create a quality website for google adsense and affiliate marketing on a cms platform.
Please suggest me as i am new to this field 🙁
Thanks

I want to create a quality content niche oriented website using wordtracker’s keyword tools, on a CMS platform and will monetize my website by displaying google ads and by affiliate marketing.
Please tell me what things i need to know to fulfill my job as i am all new to this field.
Also tell me what SEO practices i need do for my website.