If you want the best score possible, the thing to do is actually to keep Wells and ask them for a credit line increase. If you will apply for a loan soon, ask them for a "soft pull" where they do not pull a copy of your credit report when you ask for the increase. Once it is paid off, you still need to use it once every 6 months or they might close it. Or, you could have a recurring bill charged to this card every month - like the cable bill or your Platinum Membership
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A balance transfer would not hurt your score as long as the credit used remains at 30% or less of your available credit. But remember, they usually charge a 3% fee for a transfer, so be sure to compare that with what you are paying in interest.
Lastly, thank you and all Platinum Members, Sponsors, and Chairman Members for supporting the site. Your support makes all this possible.