My stock cane steering servo = Toast! Please suggest a good replacement that won't cost me a fortune. Or perhaps even tell me what to look for when shopping for a new servo

Hi-tech322HD decent servo about $15 bucks, plastic gear, but holds up well to alot of abuse, that's what I'm running in both my savages for steering and throttle and all our redcats and himotos. You can bump it up a notch and go with the Hitech carbonite gear servos they come in around $25ish

at least a hs645. They are 133oz. I wouldn't go any lower. Track use, the 645's dont even hold up that great. I know you said cheap, but remember you get what you pay for.
And go for the mg's.

Well I went to my LHS and got a pretty good deal.... I think... you be the judge. He sold me a Futba S3305 for $30.00 I know it might be a little short on the torque, but it should last a while longer than the stock one did (knocks on wood) eventually I would like to buy all new electronics but atm my kids need shoes

I have installed and test ran with this new servo and it seams to work great, but I noticed it buzzes a bit in the neutral position until a manually turn the wheels a hair. Is this normal? or do i have a linkage problem or something? my old servo did the same thing

3305's are ok. We just didn't have any luck with them on the track. You'll be fine.