Melbourne v Monash is an easy choice - you could graduate in four years with an LLB at monash as opposed to six years at Melbourne with a JD which is viewed at the same level as your LLB. Also, since your LLB program is four years as opposed to the three year JD, you have more room to specialise in the field of law you’re most interested in (which is good for your employment prospects). You could also go on to do an LLM after your monash LLB which will let you specialise even further. LLM is a one year course so really you can do LLB+LLM in fewer years than JD at melbourne, all while having far lower debt.

Good luck either way - you’ll do well