integrated or separates...on a $1200 price point?


I am running B&W 685s and a HSU sub in a 2.1 system, and I need to upgrade my 15 year old Yamaha receiver. I have been advised to purchase a high-end integrated rather than separates in my price range, which is around $1200 or so. So I am looking at: Creek 5350SE, Exposure 2010s, Parasound Halo A23/P3 (used), or used NAD gear (like the 2200 power amp). Looking for great sound reproduction across several genres, not all of which are easy to reproduce: rock, classical, some dense IDM, and other heavily layered music. I am wondering if the lower wattages of the integrateds leave enough head room to punch through the entire frequency spectrum.
realremo
Also noticed recently that Parasound Classic 2100 pre amp has bass management built in - which is nice because I run a 2.1 system, I would not have to buy a separate BMC! I could high-pass the B&Ws. BUT the Classic series is kind of ugly.
New I would go integrated.

Used I would go separates but be prepared to be patient and spend a lot of time checking here and ebay for good deals.

Mark
Thanks for all the advice. I am still saving up, I don't know how long I can last before I pull the trigger on some new equipment.
I picked up a B&K Reference 5 s2 pre for $400.00, used and a B&K Reference 200.2 s2 amp for $650 used. I think it works quite well with my Paradigms, but don't know how it would do with the B&W, but I imagine it would be pretty good.
The DK integrated are a hybrid and give you the solid state slam with a tube preamp built into one package. A great bargain used.