i want to buy a flash for my eos and have absolutely no idea which one.

the following prerequisites are important:

- it can not be expensive
- i dont want it attached to my cam, but loose and automatically triggered via remote (or how ever it works :)) (being able to some day use a few speedlights with the same system)

additionally: what cheap accessory can you suggest if i want to trigger my cam via cable remote

(i just came back running and somehow my dictionary does not work at all. so sorry for all misconceptions)

While you will most likely get some good advice here, I would suggest that the information from a place like POTN:

http://photography-on-the.net/forum/forumdisplay.php?f=35

will be more varied and from more people!

I think that you want to obtain the Canon 580EX 5peedlights, if they are within your budget. Remote triggerng is another matter because the Canon ST-E2 is fairly expensive for what it does. Check out the POTN site specific to Canon Flash above. Make sure you read the stickies first!

Good luck!

430ex + St-e2