How different between B&W 804s & B&W 805s????

thanks for your response. Yes i want fuller sound and more bass .That's what i mean better :-)I'm using Marantz Pm14MK2.

The 805s sounds ok to me until one day i heard it driven by a McIntosh 6900, i realize this is what my speakers need and i'm saving money for this amp now. I can't stop thinking about it :-).
You guys so lucky living in U.S where you can borrow amp, cdp bring home and testing with your system. NOT LIKE MY COUNTRY. Thanks you so much for your advices... I also like the 804s. Its second hand but few months used only. The importand thing is it's a nice price. My room size is only 12sqm(3mx4m. Btw does anyone here using NORDOST interconnect, speakers cable with B&W??? How's the result???

Thanks everybody for sharing your experiences. I think i will keep this 805s and earn more money for the new McIntosh 6600. I heard this one is better than 6900.
Does anyone using Nordost interconnect with B&W speaker? Give me some reviews please.

Blackstonesjd : Thanks for your post, it very helpful but i think i'll stay with 805s (Or may be upgrade 804s) because my room is small, it's only 12spm (3x4). 803s will be too big for this room. I'm going to buy a new McIntosh 6600 soon and find out what 805s can give first then upgrade the speakers later.

I've heard MA6900 pair with this 805 before at a hifi shop. It sounds amazing even the room is big and room acoustic not so good, I believe MA6600 can do better than that. Once again thanks all of you for sharing experience, i'm sure those experience cost you alot of money in the past