OK, my budget is getting bigger by the day, it seems. Is the Boston Acoustics VR975 a good idea as towers for audio with no separate sub? Meaning is the powered sub it contains enough for the job vs a good separate powered sub? In comparison,how about the VR950s with a separate posered sub? How would this compare to the above? Finally, any good online reputable sites for online Boston and other top line audio equipment? Thanks!