Rafa,
What DLSR are you planning to carry?. I have the Slingshot 200 for my 5D kit and the 100 for my G1 (bought originally to use EOS 400D/lenses but its just right for G1). I haven't tried any other Sling so can say much about them.
I only like a Sling when I hike or walk long periods of time with more than 2 lenses--for instance, if I want water, maybe a light sweatshirt, etc. The Sling works pretty well--I can pull it around and change lenses, grab another battery, card, etc., but like a shoulder bag for day to day. If you have an opportunity, try a sling to see if you really want to carry one a lot. I still iike it a lot better than my 2 backpacks--I have a LPMinitrekker (which I need to sell--never used) and an unknown model Delsey which is nice to use as it sits on the ground upright, but still means you have to take it off. That's why the slings have become so popular--as you obviously know.
I sling my shoulder bag (Terraclime these days) over my chest/back and its by my side or pulled to the front to use. That works pretty well, but the TC can only carry a 5D, for instance, with a small zoom or primes--and likely not a second lens. My Domke 6 can handle more but is still light, but my favorite for DSLR is the F3x (I have black).
http://www.tiffen.com/displayproduct.html?tablename=domke&itemnum=700-30DThis is a super bag for DLSR, 3 lenses (one mounted) and assorted other things in side pouches, front pocket, back pocket. Its light, easy to work out of, but maybe not the protection you want--altho' throw in a couple of wraps or towel on the bottom and it should be fine.
The F6
http://www.tiffen.com/displayproduct.html?tablename=domke&itemnum=700-60D
can be more or less protective depending upon the insert(s) you choose. The F3x 'slings' better though.
Diane
Hi guys, did anyone ever try the Kata DT-221 sling bag? I'm looking for a sling bag that is not too huge (like the Lowepro SlingShot 100 AW) but that will allow me to take a DSLR, my wallet, keys, may one extra lens and a battery, some papers. Or if not this one then which one would you suggest? I have one that I use on a daily basis but it doesn't protect the camera at all.