I just did the same thing with a blazer. In fact, I had the same conversation with myself about the blazer AND some clearance fab $20 trousers at AT.
I bought the blazer and left the pants because:
Blazer - blazers are a staple in my closet, I wear them year round if I can, they are classic, and will fit me regardless if I lose more weight or not.
Trousers - they fit impeccably and were excellent quality for the price, howEVER, being a winter weight, I'd only be able to wear them another week or two here and there is no telling what my body will be like next fall, so I passed.
In summary (wink), if it's something you KNOW you can wear next fall and the quality matches how great it looks, then get it.