Joined: Jan 2009
Posts: 43,982
Likes: 6,171
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
Use a milk crate until you save up more money to get the best. If the Ortlieb costs more than $60, wait until you can afford it. I have Ortlieb panniers, not a trunk bag, and I am super impressed. If [MENTION=329644]Double0757[/MENTION] says it's good, then I'm sure it's worth the money. Don't skimp, because you can make this purchase once instead of twice.
And by the way, a milk crate is not a bad thing to have on your rack. I used to use a backpack when off the bike, and then I'd toss it in the crate when it was time to roll. Very convenient but heavy.