I would only recommend using veg-tanned leather if you are going to do some tooling on it. Otherwise I like to use chrome tanned leather like a good oil tanned or even latigo (which is tanned as a veg first then retanned as a chrome).
Veg-tanned leather works well and gives you the option of tooling it, but will be stiffer and take longer to break in. Chrome tanned leather is, for the most part, softer and gives that broken in feel right away, but you can not tool it.
Latigo, being a veg and chrome tan will give you the best of both of the above mentioned leathers. Latigo takes a stamp good good and is stiffer than a oil tanned leather but softer than a veg-only tanned leather.
I'm a big fan of using what you have and any of these leathers as well as hair-on hides works well for quivers.
K.C.