My old student model is tuning horribly and I was suggested to just buy a new one

off the internet I found these 3 choices

an unknown conn: I couldn't figure it out but here's a picture.
http://www.inaneasylum.org/r/fee1afccf95a3cde74ea5be6b9bd71e4.jpg

a Prestini 700...

or a large selection of Bundy's

I would say I'm about an intermediate just a freshman but I would like this sax to last.

I would appreciate any help thank you