G'day Dan,
The standard advice is to try before you buy, but in many or even most instances, that won't work in Australia.
Another standard piece of advice is that you really cannot go wrong with any of them, and there are many happy shooters of all of those.
Now, there are two personality types when it comes to archers, generally speaking.
The first type, which I consider myself to be, is not very fussy or sensitive, and will bloody-well make any bow work, maintaining that all bows shoot just fine if I do my part.
The second type of archer is always looking for the holy grail, and soon becomes dissatisfied with the bow, usually saying that the grip doesn't suit, or something.
Now, I'm a bowaholic, and have quite a few bows, and like them all. Having placed myself in the first category, I must admit that I struggle to shoot short Hills and Kodiak Magnums, due to my longer draw length. So, if you have an idea about the length of bow that best suits a particular style of bow combined with your draw length, it is very hard to go wrong.
I've not got any experience with the bows you listed except for the Silvertip, which naturally I have much good to say about (I do tire of reading, "Hey, get my brand of bow because I shoot it and it's the best!", which we often see here). But many others will no-doubt have much good to say about the others.
So, I've had and have numerous bows, and only once have I been able to try-before-I-buy. I've done my research, and decided what I like the looks of, and haven't been let down.
So, consider comfortable shooting for your draw length through research here and through asking the bowyer, and just go for the one that you and your wallet like the most, and you won't be sorry (unless you happen to be quite fussy).
Cheers,
Ben