Craig, Actually their are many very cool advantages on the VSX1020-K and VSX-1120-K and the amplifiers and overall build quality are the same as the 9040 so you benefit by getting a new generation receiver.
Here's some of the new features built into the 1020 and 1120:
1. The VSX-1020-K and VSX-1120-K are compatible with Pioneer’s new app for its home theater products available for free download from the App Store. The app turns iPhone and iPod touch into a fully functioning remote control for the receiver.
2. Bluetooth Audio Streaming – The full line of new models features wireless Bluetooth audio streaming from any Bluetooth enabled iPhone, iPod touch, Android platform, other smart phones or personal computer with an optional Bluetooth adapter. Pioneer's AS-BT100 Bluetooth adapter permits you to stream music from all portable devices and bring them into any 2010 Pioneer receiver. In addition the two high-end receivers, VSX1020-K and VSX1120-K have Pioneer's exclusive "Sound Retriever AIR, which restores much of the original audio data that is removed from compressed audio formats, especially when transferred via Bluetooth.
3. 3D-Ready as all 2010 Pioneer receivers are HDMI 1.4
4. All 2010 Pioneer receivers have Dolby Pro-Logic IIz built-in. Dolby Pro-Logic IIz adds a front height channel to create the depth and dimension.
5. The VSX-1120-K and VSX-1020-K, now have Internet Radio built-in. Of course the receiver would need a wireless, powerling or CAT5 connection to your home network. This is a great new feature that brings thousands of radio stations to your home theater system. Once you experience Internet radio you will not want to use your iTunes or iPOD music when at home.
6. Excellent video processing from Anchor Bay on the 1020 and Marvell on the 1120.
You will enjoy everything the 9040 delivers and much more. These new receivers are deliver excellent clean full range audio and very powerful new features.
Sorry if this sounds like a commercial, but it is just a list of the actual facts. For receivers we are Denon, Onkyo, Yamaha, Pioneer and Pioneer Elite receiver dealers and for the past two years Pioneer has come up with some of the very best low and mid priced AVRs.
Enjoy!
-Robert