From what I recall, shipping is very quick. I think last time I bought gear from MD, I got it within a few days.
I'd go CC rewards and just buy them outright if you already have the money and feel comfortable spending it now. and not to throw a wrench in it, but I bought mine from here:
LINTON Heritage The Wharfedale LINTON represents one of the most iconic models in the long history of Wharfedale loudspeakers. A model that embodied the Wharfedale pioneering research through the 60s, 70s and 80s, with a bloodline dating back to 1965, LINTON has always been manufactured...
almaaudio.com
Looks like $100 cheaper than MD. It made a lot of sense for me because I got them at the old price, but there was also free shipping and no sales tax for me. Today, that's a $300 savings (looks like the speakers do not ship for free from MD and it's a $150 charge plus tax would be $150 for me). So it saved me quite a lot of money. Might be worth looking into. MD might be better if there happen to be any issues though so you may decide to just buy from MD.