There is nothing fantastic about Canon 7D that is worth rushing for you buy it, other than its 2 processors that does nothing than filling up storage cards. So you can always wait.
Getting a mid range models will do fine too. Less repayment pressure more happier usage.
It's NOT true that there's nothing fantastic about 7D. It's quite an impressive imaging tool.
HOWEVER, if finances are tight, I suggest the 450D. I know 'cos I own both 450D and 7D.