I like the medium bleecker duffles that you can wear cross-body. I also bought a hamptons hippie that is outlet only and I really like that bag because it's bigger than a swingpack (and I can fit my regular wallet in there) and is still slim so it doesn't stick out much, it's also only $175
here is the bleecker.. in this pic the strap is doubled but it can be made really long too..
there is no drilldown pic of the hamptons hippie but here's mine
on the opposite side there is a outside pocket to slip things into that is nice and handy!