I have been a loyal and Elite customer of Continental for years. I now have to switch to UAL or Delta to keep in line with our Travel Policy. I have been offered a Comp to Silver on each is I desire. I travel mainly domestically our of EWR. I am taking a personal Flight to Prague in the next three weeks and want to pick one or the other before I take that flight. Why give up over 8000 miles right? I know Catman loves UAL out of EWR but since I'll only be Premeir do I have much of a chance for Upgrades. I only have 8000 UAL miles and 70,000 Skymiles. But do have 4 UAL upgrade certs b/c of bad service. Any Advice. I wish I couls stay with CO. I'll miss terminal C at EWR. Thanks as always for the help!