Okay, I'm not going to sugar coat this for you at all.I like them.
They're not really original, but they are in that they both have common design aspects with other starships but they still retain uniqueness because they have never before been arranged in this fashion.
In any case, I love the second picture, the first one could use a bit of redesigning, specifically in the nacelles (possibley sweeping them backward or forward to make a more agressive look), but that's not totally important.
I look forward to seeing you develop these further in the future.
Remember, friends don't let friends design starships without specifications!
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SMINT IS EVIL!