Hi,
This topic has been debated several times on beoworld and can spark a lot of different opinions.
I think the BL1 is far superior to the BL8000 sound-wise. The only drawback of the BL1 is that you might expect a better performance in the low end, but this is not perfect (but much better compared to the BL8000). Adding a BL2 solves this and makes a lovely setup.
Design and color is very personal; I like the black version, when I bought my BL1 the only options I considered were silver and black, which I think are both very nice looking.
Go for it, you wont regret it!
Bieele