eeibaby, you said you can't find the Merona cardigan at Target so throw that out of the window.
Here's what I would do.
Option A: If I could spend $50-$70 on a cardigan from Banana Republic or Express (they usually have plenty of sales and it is worth checking the sales rack) Iwould go with that.
Option B: If you don't want to spend $50-$70 on a cardigan, go with the cheaper alternative of a v-neck sweater.
Then get yourself some white shirt and navy tie.
I'm not sure how many times I've said that.
jmal519, I 'll say the same thing, white shirt and navy tie is so versatile it should be a mans staple.
As for shoes, get yourself some oxfords, preferably brown. Again, a mans staple.
Checkout Nordstrom Rack and look for Allen Edmonds, Cole Haan, Johnston & Murphy, To Boot New York, etc...
You should be able to find a pair in your budget.
J&M is a decent shoe for the price, better on sale.
I like this Moc Toe from J&M for $140.
Also, check out DSW if possible and browse around Endless.com for some good deals.