please don't get a seagull! i bought one and it's a piece of crap. all of the one's i've borrowed or used through the school were also crap. mine jammed just after the warranty ran out and i don't think it's worth fixing.
i also own a kiev. i'm no expert, but the optics seem great for the price. it's easy to tell the difference between that and the seagull, believe me. unfortunately it has a cloth focal-plane shutter and not the copal type (only syncs at 1/30), but that's not a huge issue.