I'm a UTS law student.
If you have the marks for UNSW then UNSW has a good reputation so I would recommend that. On the whole I think that UNSW is overrated to death but I'm a Usyd graduate and you'd probably expect me to say that. But you cannot deny UNSW's group of eighthood and thus it's a good choice.
To actually answer your question though I like UTS Law a lot. Particularly as an undergraduate it doesn't really matter which uni you choose, and all the posturing that goes on in this forum is, I find, pretty ill-informed. You need to pick what is best for you.
There is nothing wrong with UTS law that I can think of so I'll tell you what's potentially right about it:
The location cannot be beat. Unless you live in the Eastern Suburbs, UNSW is a bit of a dog to get to and there's not much else there. UTS is in the city and right next to Chinatown, Central Station, heaps of bus routes, food and entertainment and all sorts of fun things.
UTS is also good for some things for combining degrees. UTS is known to be very good at IT, Business (though UNSW thinks it's pretty good at this as well. Seems like a international student money making venture to me, though UTS seems to focus a fair bit on this as well), International studies (if you're interested in this I would say UTS hands down) and communications. If you're more for Arts, usyd, club Mac or UNSW would be better.
Compared to my alma mater of usyd and I think the same probably applies to UNSW as well, I think UTS has a much more practical approach in general as well. I find their approach to students in terms of facilities to be very good as well. However the atmosphere is lacking compared to UNSW or Usyd or even Mac and the library at UTS is a bit shit as well.
UTS is the home of Austlii (as well as UNSW but it's all at UTS) and if its any indication the law school guide, communications law centre and stuff like that. So it isn't the forgotten law school of Sydney by any means. It was the first to offer the JD in Sydney I think as well. I think it's pretty innovative and forward thinking for those reasons.
On the whole as a new undergraduate you need to choose what is right for you and thus you need to ignore some of the crap that gets bandied around here. You can get into, for example, a top tier firm at any of the unis that you asked about in the OP. It's up to you to study hard. Some people get thingy about the prestige and the name of the uni (if you want this it's usyd) but in the end all undergraduate law students pretty much learn the same thing and I would even consider, given the marks you got and that you can choose, the geographical location of the unis.
Good luck in whatever you decide to do anyway. Law is hard work wherever you study it but if you like it and you're good at English it's really amazing too.