That extra money you are spending now to get a more flexible receiver will save you money in the future.
When you are ready, all you will have to buy will be a separate amp & cables to hook up to your receiver. Rather than having to buy another receiver with the preouts AND an amp.
All speakers benefit from more power Ryounglaw, when you add a 200wpc amp to your Denon you will hear a big difference. Some good companies to keep in mind for the future purchase are Outlaw, Emotiva, Parasound, Sunfire, B & K, Nad, Adcom. If you want to buy used check out Audiogon.
Congrats & have fun.