It's not that everything in those stores is bad fashion, but that general trends persist in each that make it hard to find good stuff. Calvin Klein makes stylish, affordable suits, for instance - and you can buy them at either store - but you'll have to sift through racks and tables of offensive lime shirts (like the guy on the right) to find them. In the end, both stores cater to a very general clientele that doesn't necessarily care about fashion, and I wouldn't rely on the salespeople at either to have a strong sense. I'd sooner just go straight to a CK outlet or something, or else spend a little more money on the suit.

If you really want to go budget though, H&M makes surprisingly awesome suits for fucking no money. They fall apart immediately, but god damn are those clothes cut well.