HTC Desire :: Odd Contacts On Gmail Account

I have about 300-odd contacts on my Gmail account - most, if not all, have no telephone number information on them, but I am guessing they still get copied over to the phone? Such that I will have a contact card on the phone that has no number, just an email? I don't email that much from my phone, so it seems pointless having most of these "email only" contacts on my phone. Secondly, a number of these contacts are named by email address i.e. some contact names appear as "doug1986" simply because Gmail has taken it from the email address doug1986@whatever.com. I really rather not have these synced across tot he mobile as they are old addresses (which I still dont want to delete).