Costco is good, because you know exactly what your getting- and it's a value for the money. The problem is, guests frequently recognize platters from Costco (I can't remember how many events i've been to with the signature Costco tortilla/turkey sliced wrap up.)
I'm not sure where your located, but Balducci's (formerly Sutton Place Gourmet) does a wonderful job with platters. They have several locations around metro dc, and the chef's there are pretty flexible when it comes to catering/party platters. Wegman's is also worth checking out, as it is the "costco of supermarkets"- no membership card required though.
www.balduccis.com
www.wegmans.com
*** First time poster here, thanks for welcoming me to your forum~
Cheers, -j
Jason Gabriel Mandel
Assistant General Manager- Notti Bianche, Italian Trattoria