Hi.
Given this choice I'm guessing most people would recommend the Beolab 1. They are obviously much more powerful and should be an all round better speaker. The fact that the price is the same for either they seem to be a bargain. A lot will depend on where you are using them - size of room, furniture, carpet etc.
I have a pair of 8000's (mk2) and am very pleased with them, but only after relocating them in a smaller room where the bass seemed to come alive and be more detailed. My first choice was a larger room and the bass became lost and quite ' woolly' and forced somehow. The BL1 shouldn't have this problem but a lot of people say they sound quite hard and have a lot of treble.
For looks I think the BL8000 win, although smaller they are a design icon, no doubt about it.
If you have chance to demo both pairs at home this would be ideal, then your own ears will be the best judge. On paper it should be a BL1 walkover, but given the right location and position I find the 8000 very pleasing to listen to, even at reasonably high volumes.
Let us know which you decide.
G.