I think the Rose color is really pretty, but it depends on your wardrobe I guess...for some people this would go with a lot of things, but if for instance you wear a lot of blues/greens maybe not so much.
if you are worried about matching, the grey will go with most anything, so maybe that is a better bet for your first bag and you can get a more fun color later? I went through a similar debate recently (I liked the bright blue and green bals this season, but ended up getting a more neutral dark blue because it's my first bal and I wanted it to match most things!)
Thanks for the advice.... I just check with our local store.. and they don't carry the grey color... so if I want it .. I'll have to order from mytheresa... (maybe i'll wait for the F/W collection and save up for a second Bal with a more neutral color...)