Ok, here's the deal. Every time, yes every time, I have sold an instrument I have regretted it - a 1917 Gibson L-1, A 1929 Martin 018K, a Gibson J-45 (my favorite), and various and sundry. Why? Because I was too damn impatient to set a goal to save for a new guitar and wait til I had the funds. Oh, almost forgot the Dobro Model 36. Few of us can just go out and buy another guitar. It's part of the definition of a folkie. So take the next year or so to decide on what that new guitar will be. Play some and play some more. You'll find that with some, the beauty is only skin deep. By the time you are really settled on what you want, you'll have the dough. In the meantime, do what 'Spaw says - different strings etc. to mellow the tone. You may want to even try stuffing a small possum inside to absorb some of the brightness. Now, take a deep breath, relax, and enjoy the experience. Remember, it's wise to choose friends and instruments carefully. Good luck.
dw