Amps For b&w 685?

for 300 you can get Cambridge audio 350a. It is discontinued. It used to be $500.00 they sell it and some amazon.com people are selling it for that price.
http://www.hideflifestyle.com/
How many watts are you looking for? You can get a NAD 40 watt amp c326bee for $380.00 It doesn't have pre outs or a subwoofer output though. the Nad c326bee is $550.00. It has pre out and I think two subwoofer outputs. I will check and see if I can find any more amps for $300.00.

This is a little over $300.00 It is about $350.00
http://www.amazon.com/Onkyo-A-5VL-In...7634368&sr=8-2

what about this for a price lower then your budget?
http://www.amazon.com/Denon-AVR-1312...34568&sr=8-103

HK 3390

http://www.amazon.com/Harman-Kardon-.../dp/B00198BOAM

HK has my vote, but Cambridge and NAD are great options too.

Anything with at least 50 Watts of power.

I also have the B&W 685 speakers and use it with a Marantz PM6004 integrated amp - I have a 20 x 15 foot room and listen to jazz and classical music and find the combination superb. Give it a try!

I looked at the Marantz as well, but it was a little too expensive for me. I found an HK 3490 on craigslist new for $260. J&R has them in stock right now for $449, but if you call they will give you a better price. They just can't advertise the price online. I love my 3490. If the 3490 is too expensive and you don't need the Digital inputs, then go for the 3390.