Grundig is OK (Grundig = German electronics = SUX Delux).
Check out
www.aesham.com - Amateur Electronic Supply. They carry most brands.
Depending on the money you're looking to spend, the Sangean tends to work out as the best value for the buck.
I've got a Sony, Kenwood, Icom, Sangean ... once you cross a certain price point, the limitating factor tends to be the antenna and the season (and the sunspots, and and and).
If you've got a couple hundred, you can get an excellent radio (usually with AM, FM, and weather too).
Avoid the small stuff, get a nice table radio sized unit. They will tend to have the better sensitivity and selectivity stats.
Synchronous AM is a great feature (the radio will track with the drift in the signal, generall much easier to listen to).
Many will also have SSB (Single SideBand), which is good for listening to international aircraft, Coast Guard, maritime, and Ham radio.
Look for a unit that will take an external antenna. Pretty much any stretch of long wire will outperform many of the single whip antennas that come stockcwith the radio ... again, it depends on how / where you will be listening ... a long wire may not be convenient. There are some "portable long wire" systems (Sony has one that's pretty nice).
Shop around, find a couple you like, and come back if you have any questions.
Good Luck, Happy New Year!
Scott