Thanks for the response. Any other replies are welcome as well. I will probably go for it since I really do like the slim cut. I'm just worried about the quality.
this is such a broad topic that almost deserves a thread all by itself. i'm not sure if it's appropriate for this thread, which i believe is designed to answer a simple question such as "should i buy this", or "how do you spell 'cat'". quick questions.
the answer depends on many things. what's your budget? how conservative is your environment? how old are you/what stage of your career? what's your body type? some of my favs are BB golden fleece, polo ralph lauren, RLBL, paul stuart. suitsupply and BB black fleece are two wild cards.
Black suit and white shirt is tough; black isn't the ideal suit colour, and with a white shirt you risk it looking either like a school uniform, or Blues Brothers tribute. But as you have one, go with a light blue shirt, this tie and a white pocket square and you won't offend anyone.
I would recommend a broad navy chalk stripe and a narrow mid-grey pin stripe.
I think a Dark Navy Blue with a light blue or white shirt would look great. Dark Navy Blue, if solid, and a light striped blue shirt with this tie would look fantastic! If you need suggestions on how to mix and match ties with shirts / suit combinations, you can check out my section on color theory on my men's formalwear fashion blog at http://suitupdressup.wordpress.com/category/color-theory/
^^ Sorry I misread the OP. A blue suit would be better, yes.
GuP: don't buy it. Firstly because it's fucking horrible, but secondly because Ferragamo is invariably a terrible waste of money. Not because they're bad shoes - the Tramezza range is nice, and the Lavorazione Originale can be OK too (but "Studio Ferragamo" is utter K-Mart shit for suckers). But because whatever the range, there are a hundred better shoe makers for far less money.
Read around here a bit more. This is a pervert's paradise of shoe p0rn0graphy.