FO and decisions

Today I have a finished object (FO) to show you and an idea that I am mulling over.  Usually I like it when I'm thinking over something in advance, working out little details and dreaming of the finished article.  Not so much this time.  Why not?  Read on...

I promised you an image of the felted bag I made for one of the Grandgirls so here it is -

Not perfect by any means, but I was fairly pleased with the results even if the hastily taken photo doesn't do it justice.  The inside of this particular bag was a deep, but bright, blue which I also used in the strap.  The flap was purposely placed off centre.  The bag is totally seamless, made using a partial resist.  Not showing up in the image is the sparkly firestar (? - I don't think it is that but I can't think what it actually is) I put over the last layer before felting.  All little girls love a bit of glitter!

As for the idea I'm mulling over, I need a lightweight cardigan-type top to go over a long dress which I bought, and wore, for my son's wedding in 2009.  It is a long, silk dress in a rather unusual dark purpley colour with lighter, more french pink, floral panels front and back.  I wore a pale pink-purple top with it for the wedding but that is too formal for normal wear.  It is a dress I could get quite a bit of wear out of (although I'm not normally a dress-wearing gal) by dressing it down a bit.  I probably wouldn't find anything in the right colour down town to go with it, though.

My question is, do I bite the bullet and buy some laceweight yarn (I think I know of some fairly locally which may be the right colour) and knit myself a top?  I was thinking of Simplicity (Rav link) which, I believe, should work fine with the dress.  Any opinions?

I hope the dress still fits as I haven't tried it on lately.  I've lost weight since the wedding so I may need to look into altering it a little.  Shouldn't be a problem as I know someone who would probably do it if I feel it's too much for me.  Bother it, I'll also need shoes, too, as I wore boots to the wedding.  I don't think trainers would quite cut it, would they?  It would be nice to get some more wear out of the dress, though, as it wasn't exactly cheap to buy.  Either that or I'll need to think about selling it.

I didn't really intend to start buying any yarn quite this early in the year as I do have plenty to knit up.  That is why this type of decision, for me, is rather annoying.  But, when there is nothing in stash that is suitable what can you do?  Will I really get it knitted up, though?  That is the point.  Lots for me to think about.