Hi AZSSE.
To get a good answer to your question you'd have to say what type of riding you do. If it's mostly long distance touring, you can't beat the SEEG because of the extras: intercom hook up, XM, lower fairing, softer suspension, king tour pak, etc. I've had two Road Glides now and for me, it's a better bike. I tour (1K miles last week) but like a quicker bike around town. We also have a lot of twistys out here in So. Cal. The fixed fairing handles better, esp. in the wind. I had a chopped tour pak for my 04 RG which was more than enough space for me. Some "need" more space. Check out a thread by "harleyjohn." He hated his SERG but was the only one I know of. I think it is a very comfortable bike and had two three hundred mile days last week.
Frank raised some good issues. You do get a lot more style and less practicality than the SEEG but the SEEG is more expensive. You can add the extras you want and save a bit. The German or Japanese bikes may have some better tech., but HD has come a long way. I had zero issues with my 04 RG even though it had a 103" crate motor which was pretty radical (at the time). The new bike feels very solid with the new frame. I added a digital oil temp gauge out of heat concerns. It's running right at 212* but I've been in mostly cool weather. I'm going for the fullsac cores, removing the cc and installing the SERT. That should alleviate any temp issues.
Before I bought my first RG, I road the BMW's. I liked the K1200GT but could not see spending hours at a time on the bike. Did not consider the Honda's. The Goldwing is a great tourer but too big to be practical for me. Don't even get me started with the trade / political issues with Japan but I see no reason to send their country a dime. I ride with a friend who has the 2004 BMW K1200RS. Last month, his clutch went out and he needs a single cable / part. Takes three weeks to get it from Germany and the repair cost is nuts. If you read the SERG threads you'll see people love them. Same for the SEEG. Years ago, when shopping for bikes a friend of mine asked the dealer why not a foreign bike with all the tech. The dealer, near 70 said, "They're great bikes... just no soul." I agree.
Greg