Denon AVR-1507 vs Onkyo TX-SR505

I am planning to geta home theatre system for my new house.
am new to hookin up home theatre systems, keeping my budget pretty low.
im thnkin of gettin

Denon AVR-1507
www.usa.denon.com/ProductDetails/3252.asp
or
Onkyo TX-SR505 receivers.
www.onkyousa.com/model.cfm?class=Receiver&m=TX-SR505&p=i

which one do i buy ?
both look equally attractive.

And which speakers would you recommend ?

was thinkin oh hooking up Polk RM6750 www.polkaudio.com/homeaudio/products/rm6750/

or maybe Bose Acoustimass 6 speaker system
www.bose.com/controller?event=VIEW_PRODUCT_PAGE_EVENT&product=am6_surround_index &ck=0

PLease advice !
thnx !