For under a $100 total for both front and rear look at Topeak, either the Super Tourist DX or the Explorer, both have 55 pound weight carrying limit, these run about $35 to $48 on Amazon. For the front the Voyager Low Rider front rack has a 30 pound weight carrying limit and only cost $20 on Amazon.

I use Tubus but they'll cost more than $100...try double and a bit more; the earlier mentioned Tara front rack is $105 by itself.

The Jandd isn't a bad rack but the both combine will cost around $170, and for about another $40 you could get the superior Tubus.